After the annual event, Yui ends up sharing a hotel room with her childhood friend, Shinsan. Learning of his dissatisfaction with his current relationship, Yui confesses her feelings that she's harbored for ten years. Trapped together in the confined space, Shinsan can't resist Yui's cunning yet innocent seduction—his rationality shatters as he becomes fully erect. Slender and petite, Yui trembles sensitively with every touch, climaxing repeatedly. When she whispers, "You can cum inside me," ten years of pent-up desire explode. What follows is an intense, relentless night of passion, culminating in nine orgasms before morning.