Schoolgirl Asuka is serious, obedient to her parents, and seen by others as a model student. She has male friends and even a boyfriend. Yet, she feels uneasy about this image of herself. Constantly questioning whether she's truly such a good girl, she keeps these feelings hidden from everyone. Then one day, she meets an older man by chance who fulfills her secret desires. For the first time, Asuka can honestly express her true self in front of him.