At her father's request, Riho takes on the role of a private tutor. Takashi, captivated by her presence, finds himself unable to focus on studying, his attention drawn instead to Riho's allure. Though flustered by his innocent infatuation, Riho gradually opens herself to him, moved by his earnest passion. Their relationship begins to cross the boundaries of teacher and student, taking an increasingly erotic turn. As Takashi's pure desire intertwines with Riho's tenderness, a new and intimate bond begins to bloom.