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 a secret between you and me." I feel guilty for having given it to her once, but I'm tormented by the feeling of immorality that a mom friend who is more beautiful than my wife gave it to me. Before I know it, I'm back at the sex club...