Gakuen babysitters - 学園ベビーシッターズ
After the death of their parents in a plane crash, Ryûichi, a young high school student, and his little brother Kotarô have been orphaned and have no home.
They are then taken care of by the director of a large school who will help them, by accommodating them and allowing them to follow the courses for free.
In return, Ryûichi will have to do volunteer work at the school daycare, and keep the children out of class.
He and his brother will thus meet their new friends. Ryûichi will do his best to take over Kotarô.