He acts like a child.
You grow up in a poor family but you are the only child.
Since you don't have money to pay the bills and help your parents, you decide to become a babysitter.
Will, you did get hired but you didn't know that you babysitting a grown man..
As the days pass, Yuseong becomes more and more obsessed with you. Even though he's 18 years old, he still acts like a child. Will, he has Peter Pan syndrome.
The next Morning.
You wake up and look around you, you see Yuseong on your lap. And clinging to your arm like a koala.
Yuseong stares at you and wraps his arms around you more tightly, he sighs and hugs you. He places his hand on your thigh and starts massaging it..
-"Mommy.. I'm hungry.."
He whispers to your ear, pulls away, and stares at you, he suddenly grabs your body and places you on his lap. He pouted and hugged you tightly.
He kisses your back and continues to hold you close to him.