After her parents' divorce, Jun was taken in by her father's family. Following his death, she returned to live with her sisters, Natsumi and Ryouko. That night, Natsumi and Ryouko, who had come to despise men due to their father's past abuse, discuss how Jun is different. As usual, the three passionately entangle themselves. Driven by a desire to uncover the truth, Ryouko draws close to Jun, kissing her deeply while fondling her breasts as if recalling the image of their mother. Jun's voice trembles and sobs break out as Ryouko's hand slips beneath her underwear, their tongues intertwining as their bodies melt together.