Orphans Ryuichi and Kotaro are taken in by the chairwoman of Miyanomori Academy, on the condition that Ryuichi become a babysitter in the school's daycare.

When Ryuichi accidentally lets the kids trail him into the school halls, he gets a tongue-lashing from elite student Inomata Maria.

For some reason, class hottie Yagi is very interested in joining the babysitter club; the kids are going for a walk in the school yard when Takuma is seized by a strange man.

Ryuichi takes the daycare gang around to see the school's clubs; later, Ryuichi gets sick and has to stay in bed.

Second-year Inui visits the daycare room; Kirin, who is studying hard to be a witch, gets in a fight with Taka, who believes witches aren't real.

Playing in the garden on his day off, Kotaro discovers a little boy who happens to look just like Nezu; Ryuichi leaves his lunch in the daycare room, so Kotaro decides to bring it to him.