Aside from being the motherly figure of his family, first year high school student Koizumi Haruta has an especially big sister complex with his twin, Hikari.<br><br><span class="spoiler">Finds out he is not related to his "twin" by blood.</span>
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เข้าสู่ระบบ / สมัครสมาชิกAside from being the motherly figure of his family, first year high school student Koizumi Haruta has an especially big sister complex with his twin, Hikari.<br><br><span class="spoiler">Finds out he is not related to his "twin" by blood.</span>

Koizumi's younger twin sister whom he loves. Everyone (including her family) finds her a bit odd, except Koizumi.

Keisuke's fourth sister.

Keisuke's sixth sister.

Age: 13 Kouta is a freshman middle school student and the protagonist to the series. He's a normal guy who's in an age where he starts to be interested in girls but gets mad as soon people call him a kid because of his size. He thinks that he's more of an adult than Natsuki but easily gets embarrassed when she's around him. He soon falls in love with Natsuki, but thinks he is actually in love with Kanade and not Natsuki which makes him take a lot of time to notice his true feelings until Chiaki points it out. He starts feeling too much conscious about his feelings and ignores Natsuki for a short time. Later when Natsuki's older sister comes to his house to take her back and make her some old man's wife, he admits that he loves Natsuki. Later when he was about to transfer he confesses to Natsuki. Natsuki kisses him and tells him that after he has grown up and if his feelings hasn't changed then to tell it again. In the Epilogue, 4 years has passed and Kouta returns to the house he used to stay. He again meets Natsuki in the same place where he met her first and she asks him to give his ice cream which he was eating.

Natsuki's younger sister. In later chapters she was out looking for Natsuki ever since she ran away from home, she is very caring towards Natsuki and when she found her staying in Kouta's house she insisted to stay with them as well or until Natsuki agrees to come home with her. She is very bad in doing household chores but is very good in studying.
