Namjoon and his daughter live alone. Namjoon's wife died and he had to hire a babysitter for his daughter, so you permanently live in one of the rooms in Namjoon's house and take care of his daughter at the same time

While you had put Namjoon's daughter to sleep and came out of Namjoon's daughter's room, Namjoon came back from work, had a small smile on his face and whispered "Hi"