ข้อมูลอนิเมะผู้กล้าซึนซ่าส์กับจอมมารสู้ชีวิต!

In another dimension where magic exists, the Dark Lord Satan wages a campaign with his four generals, Adramelech, Lucifer, Alciel and Malacoda to conquer the multiple-island continent of Ente Isla and annex the human population under his realm of darkness. However, a brave Hero arose and lead the human armies against the Dark Forces, pushing them back to their stronghold. Here, Satan faces off against the Hero but eventually admits defeat, and instead, along with Alciel, opens a dimensional portal and leaves their world with a vow to return. The portal exits in modern-day Sasazuka, Japan, and in addition to being shocked by their new human forms, Satan and Alciel are taken to the nearest police station, where Satan learns a bit about this new world, which lacks magic. As events progress, Satan and Alciel, get new identities: Sadao Maō and Shirō Ashiya respectively, secure a residence, open a bank account and go job hunting in order to survive, while agreeing that Sadao would work while Shirō takes care of their domestic needs. Some time later, on his way to his part-time job at a MgRonald franchise, Sadao encounters a beautiful scarlet-haired girl at a crosswalk and offers her his umbrella to shield from the rain. While at MgRonald, Sadao not only experiences a seemingly random mild earthquake, but faces a dilemma on whether to use his remaining magic to repair the broken fryers, eventually not getting the chance to. Nonetheless, while impressing his fellow co-worker Chiho Sasaki with his people skills as well as the higher-ups through his dedication, Sadao is able to secure a permanent position. As he excitedly pedals his bicycle home to tell Shirō, he is once again confronted by the scarlet-haired girl who is revealed to be the Hero from their dimension, Emilia Justina.

In the wake of Satan and Alciel's departure from Ente Isla, Emilia and her comrades give chase. Back in present-day Japan, Sadao tries to reason with Emilia; now under the identity Emi Yusa, although she ignores and tries to attack him. Afterwards, they are both arrested and brought to a police station for questioning where the officer in charge mistakes them for having a couple's quarrel, much to Emi's protest. On their way home, Emi threatens Sadao although he just shrugs. The following day while feeling angry that she isn't living a better lifestyle than Sadao, Emi pays them a visit. Shirō, in shock, locks her out but lets her in after Sadao casually explains her circumstances. After commenting on Sadao's lifestyle, she explains that she along with Archbishop Olba Meiyā were going to follow them through the portal before it disappeared but she ended up being the only one transported. Over the next few days, Emi begins stalking Sadao and Shirō around town and learns that they are living good humble lives. This prompts her to ask him after work if he had considered staying in the human world, to which he boldly states that he will return to conquer Ente Isla. Just then, they both come under a magical attack from a sniper and hurriedly escape. Sadao realizes they may have a common enemy and blames Emi before leaving for the night. Emi however shows up again at his apartment much to his suspicion and awkwardly asks if she could stay the night since she lives a distance away and lost her wallet while they were escaping. Sadao casually gives her sanctuary again to Shirō's shock while Emi tearfully ponders to herself how she got herself into that situation. That night, Sadao receives a mysterious text from Chiho warning that more earthquakes are on the way while asking for his advice.

The following morning the national news broadcasts a report mentioning the attack that Emi and Sadao were involved in while Chiho excitedly prepares for her date with Sadao. Meanwhile Emi receives an anonymous call at work from the same enemy who shot at them, who explains that killing both her and Satan would be in Ente Isla's best interests. Later, the police track down Sadao from his bicycle left at the scene and Emi is forced to vouch for his identity while afterwards warning him about their common enemy. Later, Sadao meets Chiho for their date which, unbeknownst to them are followed by a cautious Shirō and a suspicious Emi, the latter of whom drags Shirō into the cafe to eavesdrop on Sadao. During the date, Chiho explains to Sadao that she had been hearing a strange language recently (the language of Ente Isle unknown to her). She further explains that the speakers were trying to contact someone and made references to a large earthquake soon to occur. Sadao realizes that the phenomena was a magical communication system called "Idea Link" and that the earthquakes were most likely caused by a Sonar Spell trying to detect him and Emi. At this time a shocked Sadao notices Emi walk into the cafe and before Chiho can to confess to him, she is interrupted by Emi. Chiho misunderstands Emi's reasoning for her interruption and they get into a loud argument, just as a large earthquake suddenly strikes. When Chiho briefly awakens, surrounded by devastation, she reconciles with Emi who again warns her about Sadao before knocking her out with a Sleep Spell. Emi then calls out to Satan who appears from some debris in his demonic form. Emi ponders killing him right there with her remaining magic but Satan shocks her by stating he will get them out of the collapsed mall, leaving Emi to wonder why he would help them.

Satan continues to use his magic to clear the debris while keeping everyone in the mall out of harm's way. While outside the destroyed mall, Emi has a flashback showing her carefree days with her father on Ente Isla when she was younger until she was summoned by the Church to begin training with a magical sword to slay demons. Soon after, her father was killed by Satan's forces when their village was attacked, leaving her with resolve to kill him. Back in the present, Sadao learns and informs Emi that Chiho received magical feedback from the spell he cast on her father, Inspector Sasaki when he first arrived in Japan. Sadao further explains to her that the earthquake was a deliberate attack on their lives before they both leave. Afterwards Emi spends the night at her co-worker, Rika Suzuki's place where Rika explains to her how human nature can change in the face of adversity by referencing the Kobe earthquake she experienced as a child. The next day, Emi visits Sadao and falls down his apartment building's stairs. Sadao tries to treat Emi's injuries but his uncharacteristic kindness upsets her and she reveals her reason for wanting him dead. Sadao laments his inability to understand people's feelings and apologizes until they are interrupted by Shirō and Chiho. Chiho misunderstands Emi and Sadao being a couple and runs away with a broken heart. Just then, Sadao's landlady, Miki Shiba comes in, and advises they chase after Chiho while referencing her connection to the Sonar and Idea Link Spells. While tearfully making her way through the street, Chiho encounters a strange person who manifests black wings in front of the passersby. As Sadao, Emi and Shirō approach from afar, an explosion occurs and the winged person takes to the air. As Sadao and co. climb the rubble, Sadao acknowledges the person as his Demon General Lucifer.

Emi asks Lucifer how he survived their previous battle on Ente Isla but Sadao deduces that he was aided by her former comrade Olba Meiyā who had promised to return Lucifer to Heaven in exchange for his help, while Olba reveals himself to Emi's shock. Lucifer proceeds to attack Sadao and co. with Shirō taking a hit. As the group flee, Sadao explains to Emi that Lucifer draws his magic from negative emotions and hence was responsible for the string of muggings in Sasazuka. As they get cornered, Sadao teleports himself and Emi to the crowded Sasazuka Station. Here, the dumbstruck crowd looks on as Lucifer seemingly kills Sadao with a magical bullet and then destroys the overhead transport bridge. The debris head to crush Emi and Chiho but Satan emerges in his demonic form and using the negative emotions of the onlookers to fuel his magic, saves Emi and Chiho. After, Satan sets up a magical barrier, knocking all of the civilians unconscious while Emilia calls forth her magic and engages Lucifer in aerial combat. Alciel then shows up, healed, in his demonic form and joins the battle. Chiho looks on at the incredible scene at which point Satan finishes Olba and then Lucifer with a multi-layered magical punch. In the aftermath, Sadao and co. officially introduce themselves to Chiho. Just then Emi's comrades from Ente Isla, Emeralda Etūva and Albertio Ende arrive through a portal, reunite with Emi and explain the corrupt state of the Church back on Ente Isla. Afterwards at Sadao's apartment, Albertio explains he used the Sonar and Idea Link Spells which were intercepted by Chiho. Meanwhile, Satan uses his remaining magic to restore the city along with erasing the civilian's minds. Later, at MgRonald, Sadao explains to Chiho that he has enough left to erase her mind causing her to yell at him.

At the Church's Headquarters on Ente Isla a report is made by a girl stating that the Archbishop Olba's previous report that he killed the Dark Lord, Emilia, Emeralda and Albertio was false and they discuss the consequences of letting the truth leak to the rest of the church that they remain alive. Meanwhile, back in Japan, Lucifer, now wanted by the police in connection with the recent muggings, moves in with Sadao and Shirō under the name Hanzō Urushihara, while becoming proficient using the internet. Through the internet, Hanzō learns of a rumor that paranormal activity in the form of portal activations to Ente Isla occur in an abandoned classroom at a local high school which turns out to be Chiho's school. Sadao and Shirō decide to investigate in the hopes of harvesting magic power from the portal. That night, along with Chiho, the group goes into the school but are followed by Emi who claims she has to keep an eye on Sadao, despite she being able to return to Ente Isla at anytime, although Sadao and co. try and fail to abandon Emi which results her her accidentally destroying a science model. Eventually the group reaches the abandoned classroom, it turns out that had been the base of operations for both Hanzō and Olba prior to their respective betrayals and alliance. Hanzō then asks that Sadao to retrieve his PSVita game console while he is there, which he had left by accident. This angers the group although Hanzō claims that he merely neglected to tell them that he had lived there. Later, while the group is outside, the same girl who made the report to the Church of Ente Isla is seen through the classroom window, indicating she had opened a portal. Later, a new tenant moves into Sadao's apartment building and Sadao catches her as she falls down the stairs and passes out.

Suzuno Kamazuki who had fallen down their apartment building's stairs comes to introduce herself to Sadao, Shirō and Hanzō the next morning and gives them a box of udon noodles as a friendly gesture. Elsewhere, Emi receives a box containing bottles of a sacred power boosting drink from Emeralda. As she continues to stalk Sadao's apartment, Emi spots Suzuno helping Hanzō with chores and goes to covertly investigate, although she is caught when Suzuno exits the apartment and Emi falls down the stairs while fleeing. Back in Sadao's apartment, Suzuno introduces herself to Emi and thinks that she and Sadao are in some kind of relationship because of their unreserved manner when speaking to each other, which she denies. Emi then speaks with Suzuno outside and seemingly misunderstands that Suzuno might like Sadao, prompting her to warn Suzuno not to get close to Sadao. Although Suzuno already knows who Emi is, being from Ente Isla herself (unbeknownst to Emi). As Sadao leaves for work where he is made Shift Supervisor, Suzuno gives him a handmade boxed lunch. While Emi stakes out, outside MgRonald, Emeralda calls to ask the results of the magic drink, and relays that there is peace on Ente Isla for now while rumors are being spread. Emeralda further adds that the Church is currently looking for the missing Olba, warning that people may be looking for her as well. As Sadao takes his break at MgRonald, Chiho gets jealous of the packed lunch given to him by Suzuno. Meanwhile, while buying food at a convenience store, Emilia is attacked by a masked man wielding a large scythe and using Magic which nullifies her Holy Sword in a counterattack. In the aftermath while wondering who the masked man was, Emi receives a call from Chiho, venting her jealousy over Sadao's boxed lunch.

Chiho and Emi visit Sadao's apartment and are surprised to find Suzuno still helping Sadao and co. with their domestic chores, much to Chiho's shock. Later, as Sadao walks Chiho home, she confesses her feelings for him while depreciating the fact that he is a demon, since she already fell for him. Just then, Suzuno overhears Chiho's confession, causing Chiho to run away in embarrassment. Suzuno follows up by asking Sadao about his own response to being loved by people and is visibly surprised by his sincere response. Afterwards Suzuno meets Emi at the Sasazuka Station and they both inadvertently reveal their misunderstood intentions towards Sadao over the events of the past few days. Afterwards Suzuno introduces herself as a resident of Ente Isla, Crestia Bell and informs Emi that she was sent under orders by the Church of Ente Isla to investigate any leads on the missing Olba Meiyā. Suzuno further asks that Emi return to Ente Isla to confront the Church about the cover-up regarding Olba's traitorous actions, after defeating Satan. Although Emi remains hesitant in trusting Suzuno since the actions of her superior put the lives of everyone in the underground mall in danger just to kill her and Sadao. Before she leaves, Emi advises Suzuno to be leery of Sadao and co. finding out her true agenda. Meanwhile, a new fast food restaurant, Sentucky Fried Chicken boldly opens up across the street from MgRonald and its manager, Mitsuki Sarue pops into MgRonald to apparently check out the competition, although Sadao counters by having Shirō do some spying of their own. Finally, Suzuno waits for Emi after work and expresses a desire to visit Sadao's workplace at MgRonald, while Rika misunderstands the interaction between Suzuno and Emi as a lover's quarrel over Sadao, much to Emi's irritation.

Rika, Emi and Suzuno make their way over to Hatagaya to discover the Tanabata Festival in full gear. Rika, still fully enthusiastic over her perceived Lover's Quarrel between Emi and Suzuno, suggests that she first learn all of the details of the "conflict" by stopping for a bit inside the newly opened Sentucky Fried Chicken. Here, as Emi frantically tries to reject Rika's notion of her and Sadao being a couple, she starts verbally insulting Sadao, but is stopped by an irritated Shirō who had been nearby doing reconnaissance on Sentucky for Sadao. After brief introductions, and a bit of chatting, Ashiya is able to clear up Rika's misunderstanding between Emi and Sadao, by using a metaphor to describe the history between them. Meanwhile, as MgRonald's business begins losing to Sentucky for the festival, Sadao struggles to decide what to do, but eventually decides to have his employees keep themselvs busy until an opportune moment for business shows itself. Later, Shirō, Emi, Suzuno and Rika visit MgRonald, with Rika, having a less than favorable first impression of Sadao much to his irritation. Afterwards, Sadao tries and fails in various schemes to market MgRonald to the festival's patrons, but then comes up with an ingenious idea of having the franchise be part of the festival itself. Sadao then calls up a friend to deliver some bamboo plants for display in front of the franchise and has his staff decorate it. Finally revealing that they will allow the festival's patrons to hang wishes on the plants and offer a free drink to whoever does so, a plan which successfully gets MgRonald flooded with customers. While this is happening, Suzuno notices a strange purple aura hanging over the crowd in front of MgRonald, adding to her suspicion of Sadao.