During a time when I was mentally and physically overwhelmed by the stress of my college entrance exams, I began to notice strange behavior from my son Osamu. He would stare at me intently, and I even caught him masturbating with my underwear—completely unlike his usual self. Yet, I never imagined our relationship would escalate in such a way. One day, realizing my husband was away on a business trip, Osamu started passionately pursuing me. Just then, my husband returned home earlier than expected. Unable to utter a sound, I found myself unable to break free from this forbidden bond, ultimately becoming entangled in a depraved relationship with my son.