My Stepmother, Is Way Better Than My Wife... Yurika Moriyama

Year-end. Masuo, accompanying his wife on her visit to her family home, is captivated by the mature figure of his mother-in-law, Yurika, whom he hasn't seen in a while. Yurika, a widow who hasn't remarried after her husband's death. Exhausted from the trip, Masuo falls asleep at the kotatsu. The next morning, he has breakfast alone with his mother-in-law. Excited by Yurika's mouth as she eagerly bites into a sausage, Masuo begins to feel a flutter for his wife's beautiful and gentle mother, and takes advantage of his wife's absence...