Character profile
Ryuuichi Kashima
鹿島竜一Biography
Ryuuichi Kashima is Kotarou's older brother and babysitter, with a very close bond to his toddler sibling.
Story spoilers
After both of their parents die in a plane crash, Ryuuichi and Kotarou are left living together, with Ryuuichi caring for his younger brother.
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