Maria Holic

Kanako Miyamae enrolls into the the all-girls school, Ame no Kisaki. On the way to the Girls Dorm she meets a girl named Shidō Mariya with her maid, Shinōji Matsurika. However, Kanako later discovers that Mariya turns out to be a boy. With Kanako's knowledge of the fact that Mariya is a boy, the former roommate of Kanako (Ryuuken Ishima) is replaced by none other than Mariya himself.

It's the first day of school for Kanako. After a troublesome morning with her roommate Mariya, she goes to the class without having any breakfast. Afterwards a welcome speech is held by Mariya and the school student council.

Mariya lends Kanako his rosary which is of great value. Unfortunately, she leaves the rosary in the classroom. As she went back to get it, three girls, who are fans of Ryuuken and are jealous of Kanako because she is on good terms with her, found it and threw it out of the window. Kanako runs outside to search for the lost rosary. On the same day, Ryuuken tells her that she will protect her.

Ryuuken held her promise and "protects" Kanako. She always stays beside her and attends classes together with her, although she is a class above Kanako. She even stays overnight at Kanako's room. But Ryuuken's protection causes Kanako more pain than ease. A classmate of Kanako (Kiri) notices it and to help her, she tells Kanako that they are going out.

Kanako tries desperately to become friends with Kiri. Therefore she asks her Sachi for help. The dorm mistress checks the rooms of the girls for forbidden items. Afterwards, she piles them up on a table and judges how good an item was hidden. Amongst the things found, Kanako's bag, which has a live unidentified mysterious animal residing in it, is also there. She is then told to hide it again, and if she passes the supplementary test, she can then keep it.

The physical examination will be held this afternoon. However, in spite of Mariya being a boy, he attends the examination and Kanako finds out what's behind Mariya's attendance at Ame no Kisaki. Shizu, Mariya's twin sister, makes her debut in the series.