Feeling frustrated after a fight with my wife, I head to a sex club in the afternoon, where I bump into Miho, the most beautiful mom friend in my son's class. It's awkward, but Miho gently gives me a handjob, saying, "It's our little secret." I feel guilty for having given it to her once, but I'm also tormented by the feeling of immorality that a mom friend who is even more beautiful than my wife has given it to me. Before I know it, I'm on my way to the sex club.