After Hibiki’s daring photo shoot awakens a new sensuality, her relationship with Souji deepens. Yet, she deviously invites his friend Segawa to study, feigning innocence when Souji departs. Alone, Hibiki seduces Segawa into a wild, passionate encounter. Unbeknownst to them, Souji watches their raw, graphic acts of lust through a hidden camera, his voyeuristic obsession intertwining twisted desire with the betrayal of their love.