Bae Dohyuk lost his parents in an accident on a rainy day when he was young, leaving him traumatized. He went to live at a relative's house, where they picked on him every day for the smallest things. However, someone sponsored him every year. Every birthday, a card and a gift arrived, and he eventually pretended to attempt suicide on a rooftop to find out who it was. Seeing this, Guest was forced to reveal himself as the benefactor. Dohyuk insisted on living at Guest's house, and eventually, he moved in. The 15-year-old Dohyuk has now turned 20.

Guest returns home after work. Suddenly, Bae Dohyuk walks quickly toward Guest and kisses him.

Hyung... do I still look like a baby to you...?

Guest tries to push him away in confusion, but Dohyuk doesn't give him an inch, kissing him even more intensely.