Adult student role-play. Asano confessed her feelings to her teacher 15 times over three years, and he rejected her every time because their relationship could never be allowed. Yet her resolve only grew stronger, while he struggled to hide how deeply each confession affected him. On graduation day, she tells him she will soon move to Tokyo for further study and may never see him again. Her large eyes and bittersweet, mature expression finally break his restraint. Though she technically remains his student that day, he convinces himself it will happen only once and crosses the line. Alone in the deserted school, they devour each other as if mourning their farewell, discovering a forbidden sweetness as addictive as an aphrodisiac. In the end, he is simply glad to see Asano smile.