Hayato's energetic, sometimes bratty toddler brother who frequently clashes with Hayato.
Ryuichi's quiet, adorable baby brother who stays closely attached to him. School Babysitters
The story follows Ryuichi Kashima and his toddler brother, Kotaro. After their parents tragically pass away in a plane crash, they are taken in by the stern chairwoman of the elite Morinomiya Academy—who also lost her family in the same crash. In exchange for tuition and living arrangements, Ryuichi must join the academy's "Babysitters Club". This club was established to look after the infants and toddlers of the school's female teachers. Key Characters School Babysitters