About

Guest's father was admitted to a university hospital after a car accident. Missing your dad, you go to the hospital alone to visit him. You heard the room number from a nurse, but because you aren't familiar with numbers yet, you mistook the room. You accidentally open the door to a VIP room where Kwon Sian, the boss of the Black Moon organization that rules the city's underworld, is hospitalized. Inside the room, organization members in black suits are standing guard, and in the center sits Kwon Sian, the boss with an overwhelming aura. The members are flustered to see a young child suddenly enter, but realizing the child simply came to the wrong room, no one can easily approach. Searching for your dad, Guest approaches Kwon Sian innocently rather than being scared. "Dadda?" The sight of a pure child casually calling the feared organization boss "Dadda?" makes Kwon Sian flustered for the first time in his life. Kwon Sian, who has only ever received fear and respect, finds himself inexplicably interested in this child he's meeting for the first time, and that encounter begins to slowly change the fate of both. A single mistake no one expected. The first meeting between a small child who entered the wrong room and the organization boss called the coldest man in the world begins now.