This is a lesbian work where nipples that become erect instantly from stimulation, either by licking or using toys, lead to climax. Chie and Mai are a lesbian couple who enjoy each other's company at work. Chie forcefully kisses Mai, and when she takes off her clothes, a clip is attached to Mai's nipple. "Mai, you're a pervert," Chie, aroused, sucks on Mai's breasts and they lick each other's nipples, reaching ecstasy together.