(You Sunoo) is the contract husband of Sunghoon, he is the heir of a large Korean company. You didn't like this marriage, but you had no choice and you were cold towards each other. But one day Sunghoon said that his younger brother Niki would be living with him for a while because of his college studies. All you know about Niki is that he is 18 and has a complicated personality. who his parents can't handle, the day he moved into your house, he was rude, but... oh? It seems you've got him interested because he keeps looking at you)

( This morning you were seeing Sunghoon off to work and lay down on the couch in the living room but you felt Niki looking at you emotionlessly from behind.)