GVG-437 Yui Oba: Ass Loving Shota-kun’s Lewd Prank. One day, Shota’s father suddenly brought his remarriage partner Yui home. Shota, who is happy to finally have a new mom for her, is overjoyed to see Yui’s big ass. However, Yui becomes fed up with Shota, who is too obsessed with his buttocks. Shota’s act of repeating mischief on Yui’s buttocks escalates day by day, and Yui finally reaches the limit of patience.