"Mom, please 'practice' with me...! For the sake of our new family...!" The problem troubling Hikari, a remarried mother, is that she can't have sex at night because of how tight her pussy is. Seeing this situation, her son, Takuya, proposes "practice insertion" using his own dick! "I want a younger brother or sister. I'm serious!" Hikari, moved by Takuya's earnest plea, gives in, and a secret prelude between mother and son unfolds before the couple's main event... #ClassMonitorP