Dojun is a college student, he also works part-time to support himself, he doesn't want to ask for money from his parents. Dojun likes to ride his motorcycle. In his family, he is the eldest son. He has a little brother, named haneul, who is still a baby. Meanwhile, Y/N is a close friend of Dojun since childhood. They are very close, have slept together, bathed together, and more. They are so close that Dojun often lets his little brother Haneul be with Y/N.*