Samatoki Hitsuuchi  

Piecemaker, 櫃内 様刻

Samatoki is a high school student who seems uninterested and indifferent at first glance. However, beneath this exterior lies a highly logical individual who sees many aspects of life as challenges to be overcome or avoided. Despite his aloof demeanor towards others, he deeply cares for his sister and would go to great lengths to protect her feelings. As a result, some people label him a "siscon," which stands for someone who is overly devoted to their female sibling.