ข้อมูลอนิเมะCross Game

Fifth-grader Ko Kitamura was born on the same day in the same hospital as his neighbor, Wakaba Tsukishima, who treats him as her boyfriend as a result. One day during summer vacation, she makes him take her to swimming lessons on his bicycle. On the way back, to avoid classmate Osamu Akaishi, who has a crush on Wakaba, Ko joins a sandlot baseball game organized by another classmate, Daiki Nakanishi. Because he has never played before, Ko fields badly, but because he has practiced in the Tsukishima family's batting cages he hits the game-winning home run. After their joint 11th birthday, Wakaba gives Ko a schedule of birthday presents for him to give her through age 20. Soon after this, Wakaba drowns while saving a younger girl at an overnight swimming camp. Ko does not know how to respond to this until, the evening after her funeral, he sees Akaishi weeping outside Wakaba's house and realizes he just needs to cry. The closing credits show time passing and by the end, Ko and Wakaba's younger sister Aoba Tsukishima are in junior high school.

Four years later, in the fall of her second year at Seishu Junior High School, Aoba is a pitcher for the baseball team, and still hates Ko for having monopolized her dead sister's time. Starting pitcher Keiichiro Senda, who considers himself popular, asks her out on a date without waiting for a response. When she does not show up, Senda goes to her house but is frightened off by the family cat. When Ko (in his third year at Seishu Junior High) delivers baseballs to the Tsukishima batting cages, he hits four home runs, which annoys Aoba, especially since she cannot match it. In a flashback, she remembers Wakaba telling her about Ko's potential to one day pitch 160 km/h fastballs, which Aoba claimed was her ideal in a man, but that if he does, Aoba cannot take him from her. Meanwhile, inspired by Aoba's pitching, Ko has been obeying Wakaba's order to follow Aoba's workout routine.

Nakanishi recruits Ko for a rematch of the sandlot game from fifth grade. When Ko warms up with what he calls a few soft pitches, Nakanishi has him play right fielder instead, claiming he wants a friendly game. Meanwhile, when Aoba plays catch with her little sister, Momiji, she is startled to learn that Momiji can handle her hardest throws because Momiji has helped Ko practice. Akaishi, now captain of the junior high school baseball team, watches the sandlot game and is reminded of Wakaba's boasts about Ko's abilities. With Ko's fielding and batting, his team wins in a close game. Afterward Nakanishi learns that Ko did not join the baseball team, despite his surprisingly fast fastball, because Nakanishi had been kicked off it for fighting. During practice, Aoba and Akaishi discuss unsettling rumors about the Seishu High School baseball team, which has had a second straight losing year. In his office at Seishu High School, Acting Principal Shido tells a man dressed as a coach that he is pleased with his plans.

On the way to school one morning, Aoba and Ko foil a burglary they glimpse from the train by hitting the burglar with a baseball, but Senda gets credit for it. Akaishi does not believe Senda foiled the robbery, and learns from Aoba that she threw a ball that Ko had been carrying, and then from Nakanishi that he and Ko have been training in secret. Akaishi takes over Ko's training on the condition that Nakanishi return to the baseball team. At the Tsukishima batting cages, an unknown boy breaks Ko's home run record but complains about how slow the pitching machines are. The boy later appears at Seishu High School, being given a tour for prospective baseball players. Senda visits Aoba while she is working in the Clover Cafe attached to the batting cages and asks about Ko's secret training, but she denies any knowledge about random neighbors. As Ko practices pitching with Akaishi as catcher, the latter describes the dream Wakaba had the night before she left for swimming camp, in which Ko and Akaishi are a playing as a battery in the national high school baseball tournament at Koshien.

On New Year's Eve, Aoba's father and oldest sister, Ichiyo, visit her sick grandmother, leaving Aoba to care for Momiji, who is down with a cold. When Ko visits, he brings the ingredients for rice porridge. When Momiji's fever spikes, Ko helps Aoba tend her until the fever breaks after a few hours. Unlike Aoba, Ko is a decent cook, and his porridge tastes just the way Wakaba prepared it for Aoba. After Momiji tells Aoba about a time Ko played with her when no one else would, Aoba tells Ko that she will never be a good sister like Wakaba, then gets mad when he tells her she is not that worthless. Ko cooks New Year soba for Momiji and himself, but Aoba makes her own instant noodles. Ko stays the night to watch Momiji and after the three fall asleep while watching television, Aoba snuggles up to him, thinking he is Wakaba. The next morning, before Aoba wakes up, Momiji tells Ko they looked comfortable sleeping together. Ko leaves to practice pitching with Akaishi and Nakanishi, and in a montage, the main cast is shown training as time passes, ending with spring.

Ko enters Seishu High School and joins the baseball club along with Akaishi and Nakanishi, where they are put on the second-string "portable" team headed by former Head Coach Maeno. Most of the varsity team are ringers recruited by new Head Coach Daimon from around the country, including power hitter Yuhei Azuma, the boy from the batting center, and Daimon promises Shido that he will take the school to the national spotlight of Koshien within three years. When Aoba, now captain of the junior high school team, visits a high school team practice, she is surprised to see Ko playing baseball, and he tells her he was inspired by her pitching. In class, Azuma does not recognize Senda (who is on the varsity team) but does remember Ko from the batting center. Azuma tells Daimon that he only remembers faces of significant people, of which there are four on the team. One day as the portable team practices on the junior high field, out of sight from the varsity players, Maeno has Ko pitch at full strength once and Aoba realizes Ko is Akaishi's "secret weapon" for getting off the portable team.

Akaishi tells Ko and Nakanishi about Daimon's career as a coach who cares more about results than his players, and suggests they drive him out. Daimon tells Azuma that he picked Senda for the varsity team to be a pitcher who can be used up during practice, then recruits Aoba as another disposable practice pitcher. When Ko, Akaishi, and Nakanishi watch her pitch, Daimon tells them it does not matter if she pitches too much because, as a girl, she cannot play in a tournament game. When Azuma takes his turn at bat, he asks her to not hold back, and in response she insists that Akaishi be her catcher. Pitching her fastest, she almost strikes out Azuma. After Akaishi accuses Azuma of not being manly for deliberately fouling back, Azuma hits a home run on the next pitch and Aoba collapses exhausted. Afterward, Aoba tells Ko that despite her sore arm she will continue pitching for the varsity team to learn their batting weaknesses, and that she wants to believe Wakaba's claims about him.

When Akaishi meets Momiji, he is startled by her resemblance to Wakaba, who died at the age Momiji is now. Ichiyo reminds Aoba that she resented how Ko monopolized Wakaba's time, and both Ichiyo and Akaishi tell Aoba that she and Ko are alike in their competitiveness. In the park, Momiji plays catch with an old man who is a regular at Akaishi's family's liquor store. Daimon tells Shido that an upcoming scrimmage between varsity and portable teams will demonstrate how much better the varsity players are. Because of a rumor that portable players who perform well might be promoted to varsity, the third-year players train hard. Before the scrimmage, Ko has Aoba catch his pitches because he has never played in a real game and so has no comparison for his pitching. She calls them okay, which pleases him as the best compliment he can expect from her, and makes a bet that he will hold the varsity team to ten runs, which she changes to five runs after looking at her bruised hand. When Aoba arrives at the scrimmage, Momiji's old man tells her Shido has ordered the audience to sit and cheer only on the varsity side of the field.

As the scrimmage starts, Daimon tells Shido he is using Senda as starting pitcher to test his team's fielding. In the top of the first inning, the portable team is quickly retired. In the bottom of the inning, Ko quickly pitches out the first three batters, which Daimon attributes to luck but Azuma recognizes is based on Aoba's batting data and Ko's ability. After Senda gives up three runs in the top of the second inning, including home runs by Ko and Akaishi, Daimon kicks him off the varsity team and Maeno substitutes him in as shortstop for the portable team. Ko pitches fastballs down the middle to Azuma, which Aoba calls foolish and Azuma hits for a home run. The portable team quickly retires the rest of the side but has trouble hitting against the best varsity pitcher. After Daimon chews out his players for failing to hit against "small fry," they manage only one run in the third inning. At the end of three innings with the portable team ahead 3 to 2, Ko complains of being tired.