Ayaka lives alone while her husband is away for work. Being a serious and well-mannered young wife, she accepts her neighbors’ request to tutor Makoto. However, one day, overwhelmed by loneliness and the desire built up from her husband’s absence, she can no longer hold back and ends up masturbating… only to be caught by Makoto. Taking advantage of the situation, Makoto blackmails her and pins her down. Faced with his young body and overflowing lust, Ayaka slowly begins to drown in pleasure…