Ayaka, a young wife, lives alone because her husband is away on a business trip. A diligent and sensible woman, she had taken on a tutoring job for a boy named Makoto from the neighboring house. However, one day, unable to contain her sexual desires that had built up due to her husband's absence, she inadvertently masturbated, only to be seen by Makoto! Blackmailed by him, she is then forced down... Ayaka becomes increasingly captivated by Makoto's young body and overflowing lust... ?