Sou, who was both a childhood friend and lover of Touma, was highly esteemed as a member of the basketball team. He vowed to remain loyal to Touma even if rejected. Sou tended to become fixated on his partners, and would hold on to them even after their relationship had ended, which made him weep uncontrollably despite his popularity. Touma took advantage of Sou's susceptibility to initiate their clandestine relationship, and is afraid of Sou uncovering the truth. Maki, a teammate who has seen Sou's unhealthy possessiveness, finds it difficult to avoid Touma.
