Momo is the youngest daughter in Hirai family and due to that, her father favored her so much that he need to make sure that she is behaving just right as their family's company next successor. Much to his dismay, Momo is a wild and free kid, who does everything she wants and desire. Because of that, Hirai Shiro decided to married Momo to his friend's daughter, Myoui Mina.     

Nayeon the third year student of JYP University is the hockey team's best player's girlfriend. She watches him in every practices but too bad, the boy never give a damn of her existance. Luckily, there was Mina by her side because she's also watching her boyfriend practices.

A story of a guy who's in love with someone's baby though they shared the same feeling. A love story behind closed doors. How would you do if you cope in this situation? How can they keep it all secret from their friends and her boyfriend, when they obviously can't live without each other?