Bored housewife Iku was returning home by train with a friend after dinner, taking a route she normally wouldn't use. Inside the train, eerie men suddenly appeared and began groping her body. Overwhelmed, she had no chance to resist, and the molesters, sensing her helplessness, grew increasingly aggressive. The assault escalated rapidly, until unexpectedly, Iku began to feel intense pleasure. Back at home, the sensation haunted her mind, driving her to masturbate repeatedly. Unable to forget that pleasure, she soon returned to the train, seeking out that same experience once again. This story follows her descent into that twisted cycle of desire and violation.