"Innocent face, D-cup breasts and perfect intercourse abilities! Son, that isn't your girlfriend but your mum!" Ki-ho brings Yuki to wed her. He starts cheating on her with his ex-girlfriend at Korea. Min-cheol idea of her daughter-in-law and comforted Yuki, but he understands he's taking a look at her like a woman. In the end, Yuki and Min-cheol have intercourse without Ki-ho knowing...