Joon-ha had the best night of his life with an older woman he met while drinking. He starts looking for her as he can't forget the feeling and finally they meet. However, she's going to become his new stepmom. She's his father's girlfriend. When the three start living together, things turn edgy and then dangerous when his father leaves the house one day.

Stepmom

"Innocent face, D-cup breasts and perfect intercourse skills! Son, this is not your girlfriend anymore but your mother!"  Ki-ho brings Yuki from Japan to marry her. However, he starts cheating on her with his ex-girlfriend in Korea.  Min-cheol comforted Yuki and thought of her as his daughter-in-law, but one day he realizes he is looking at her as a woman.  In the end, Yuki and Min-cheol have intercourse without Ki-ho knowing...

Japanese Mom

A sexy sister-in-law instead of a quiet wife!  An innocent sister-in-law instead of a horny wife!  Two men struggle with their sex lives and they decide to swap wives.  Jong-woo is frustrated with his wife Jae-hee because she's so silent in bed. He talks to Ji-yeong about this and she tells him she hasn't had satisfying sex ever with her quiet husband Min-soo. Jong-woo and Ji-yeong find out they enjoy various positions and plays and end up spending a night together. Meanwhile, Jae-hee and Min-soo also want something soft and affectionate and the couples can't be stopped now...

Swapping Wives

Young-suk's father, Dae-sung, is the one who will soon become your stepmother and introduces Hitomi to Young-suk. Hitomi is a young lady of twenty-five who is two years younger than Youngsuk. Young-seok's younger and sexy stepmother Hitomi keeps beating more and more. Then one night, Hitomi comes into Youngsuk's room and takes off his pants...?! Dad begins a breathtaking double life with a Japanese mother you should never know.