During lonesome dorm nights, boys tend to engage in mischievous activities. Though it's common for teenage boys to indulge in pleasurable acts, Kasumi is taken aback when he catches his roommate Hiyori in the act. To Kasumi's surprise, Hiyori invites him to stay and watch, but only if he has feelings for him. Kasumi faces a dilemma; should he stay or go? Which decision would prove more satisfying for him?