A college student keeps secrets. One is that she regularly sleeps with an older lover. The other is that she's attracted to her mother's personal trainer, which she decides to do something about.

Ji-ye gives up the rights to all inheritance to her stepmother after her father dies, and cuts herself off after she is given the expenses to study abroad. One day she hears from her aunt that, according to the will, she might have rightful joint ownership to a house that costs 40 times more than it originally did. Ji-ye and her sex partner, Do-sik, visit her stepmother to make amends. Her stepmother already has a boyfriend, and Ji-ye changes her mind to get rid of the disclaimer that she signed. However, it is nowhere to be found and Ji-hye is attracted to her stepmother’s boyfriend...

Yoon-jeong goes home to her mother to introduce her to her boyfriend who she promised to marry. Her mother likes Seong-tae and that he's a pharamacist. Sook-jin prepares a feast for her daughter and future son-in-law. They have a good time until Sook-jin's boyfriend Jong-pil joins them. Yoon-jung is shocked to see Jong-pil...

Koyuki, disliked by her young and beautiful stepmother, has a passionate love affair with her boyfriend Josuke at home. However, while Josuke is with Koyuki, he keeps thinking of her mother, who has a rich and mature taste. After that, Josuke, who was sentenced to break up with her Koyuki, unconsciously remembers her Misae and goes to find her.