Rino is a bright and kind schoolgirl who treats everyone with equal warmth, always uplifting those around her with her positive attitude and valuing human connections. One day, she casually greets a middle-aged neighbor in their apartment building—an innocent act that unexpectedly triggers a dramatic shift. The man, overwhelmed by stress and unable to cope with work, finds his emotional barriers crumbling at her gentle gesture. Losing control completely, he blackmails Rino into his apartment and forcibly restrains her, subjecting her body to his desires. The situation escalates further when a coworker arrives, turning the encounter into a shocking threesome.