Sister Princess

Wataru, the top student at his school, is in a depressive mood after failing to pass the entrance exam to a prestigious high school because of a computer glitch.

As Wataru gets used to life in the mansion, many mysteries await him; there's a blistering-hot kimchi gratin no one remembers cooking; he encounters a monster out in the woods; also he meets even more sisters of his.

Wataru and his sisters attend their first day of school, but Wataru feels the pressure to watch over them; everywhere he goes at least one of his sisters follows him wanting attention, and Wataru starts to feel overloaded.

Hinako, the youngest of the sisters, is missing; she has left a note that she's going to look for Mr. Teddy Bear; Kaho asks Wataru to go look for her, and it ends up being quite an adventure for them both.

Hinako sees Wataru using his PC and decides she wants to send him an e-mail; all his other sisters join in, sending him updates on what's going on in their lives; he has a mysterious pen pal named Aiko.

Wataru, Mami and the sisters write a play about twelve princesses to try and win a contest.