Ririkka, a college student who started living together with someone, hurts her waist and calls in temp massage therapist Hasegawa. She gets carried away by the risky treatment and starts a relationship with him. While her boyfriend Yuuma is frequently absent, she indulges in loneliness and pleasure. In the end, she breaks up with Yuuma and goes to Hasegawa. Unable to make a sound from the teasing treatment and tool torture, pleasure is etched into them. Swinging between guilt and depravity, they gradually seek out trysts on their own.
