"It's been five years already since this relationship began." Five years ago, I made a mistake with Kitayama, my son's friend. After I discovered my husband's affair and was exhausted, Kitayama gently embraced me and confessed his feelings to me. Touched by his kindness and feelings, I took his virginity that night and crossed the line of infidelity. From that day on, I spent many secret meetings with Kitayama, hiding them from our families, and we had very happy times. However, five years had passed, and our relationship had changed, so it was time for our friends with benefits relationship to come to an end...