After losing both his parents in a plane crash, teenager Ryûichi Kashima must adjust his life as a guardian of his younger brother Kotarô. They are approached by Yôko Morinomiya, the chairman of an elite school.
Ryûichi is now in high school, he goes on making a poster to invite new members to the babysitters club. He catches fever the next day and Kotarô is trying hard to help his brother.
Ryûichi is now in high school, he made a poster to invite new members to the babysitters club. He catches fever the next day and Kotarô is trying hard to help his brother.
Ryûichi is approached by a senior who's in love with a teacher. Kirin and Taka are trying to prove that witches and superheroes are real and the babysitters are trying to help them.
Yuki's friends gossip about what they like about Ryûichi and Hayato Kamitani. Kazuma is down with a cold and the twins are separated for the first time, Takuma seems strong enough to handle the separation.
After getting a mysterious love letter from his locker, Ryûichi is feeling anxious along with Maria Inomata and Yuki. Taka invites Kotarô to go to the festival with him.
The entire babysitters club and parents go to the beach, Inomata is also invited. Taka messes with a most precious thing of Hayato Kamitani, Ryûichi and Hayato Kamitani have a talk about the sibling struggles.
Today is a cultural festival day, all the fathers pay a visit to watch their kids do juice service in vegetable costumes. Kotarô and the kids wait for the eggs to hatch.
Ryûichi is invited by his friends for a movie and he had to leave Kotarô with Keigo Saikawa. On Christmas day, Ryûichi is planning to surprise Kotarô as Santa.
