Reiko Kitagawa, suffering from sex addiction, receives little affection from her husband and relieves her daily frustrations through masturbation. However, simple self-pleasure no longer satisfies her, and she begins pursuing Hirai, whom she's had her eye on for some time. Her inner darkness grows deeper each day, and eventually she deliberately drops a condom in front of Hirai, extending an invitation of seduction. For her, this act becomes a ritual of emotional release and pleasure. Unable to endure the growing ache in her body any longer, Reiko makes the decision to offer herself completely to Hirai. In that moment, she is swept into a whirlwind of new emotions.