Rabu Saotome and Arisa Suzuki's relationship appears friendly on the surface, but in reality, Arisa secretly envies the beautiful-breasted and cute Rabu, harboring deep jealousy. Trying not to be noticed by anyone, Arisa repeatedly torments her—forcefully pinching Rabu's nipples, clamping them with clothespins, and persistently touching her groin, tormenting her in various ways. One day, Arisa decides to intensify the abuse with their friend Yume Wakatuki, luring Rabu into a storage room where she relentlessly assaults her gorgeous breasts. Rabu gradually begins to respond to the torment, unable to withstand the escalating treatment. Through this process, their relationship deepens further, and Rabu finds inner liberation, awakening entirely new emotions.