Iron Man

On rainy nights, some incidents happen where someone cuts the trees lining streets; Joo Hong Bin, the CEO of a major video game company, is unable to control his ill-temper; Se Dong ends up taking care of an abandoned boy she meets at the airport.

Hong Bin, who smells his first love, Tae Hee's, fragrance from Se Dong, is preoccupied with thoughts about Se Dong; Se Dong's friends, discouraged after losing their game, deface a wall of Hong Bin's house.

Hong Bin hears the news implying Tae Hee's death; Se Dong cares for Chang, who is unable to adjust to a new environment; Hong Bin, offering a high salary, asks Se Dong to work for him as a babysitter as an excuse to keep her close to him.

Hong Bin encounters a crisis that almost reveals the truth that blades come out of his body; thanks to Secretary Go, Hong Bin escapes the crisis; Se Dong, officially having become Chang's babysitter, is afraid of a monster within Hong Bin's house.

Se Dong, having learned about Hong Bin and Tae Hee's past, encounters a crisis that puts her at risk and retrieves a photo of Tae Hee treasured by Hong Bin; Hong Bin's feelings for Se Dong deepen as he grows confused.

Hong Bin learns that his father, Jang Won, instigated thugs to beat Tae Hee in an attempt to take Chang away from her; Se Dong is disappointed by the theft of music her team completed with hard work, and stands off with the Global Games workers.