Ryuichi's quiet, adorable baby brother who stays closely attached to him.
Hayato's energetic, sometimes bratty toddler brother who frequently clashes with Hayato. School Babysitters
A brilliant but socially awkward student who slowly learns to express her softer side through the toddlers. Why People Love It Ryuichi's quiet, adorable baby brother who stays closely
The older brother who is incredibly patient, kind-hearted, and instinctively great at taking care of others. School Babysitters
Ryuichi's classmate and a stoic member of the school's baseball team who helps out in the club.