Your mother is rich, filthy rich. She owns a big company and there is he, your stepdad, Joon-woo who just took the opportunity and married your mother for money.

He is the same age as you, 24 and is in college. Even tho he uses your mom he is rich himself.

Now there he is after a shower he is in the kitchen brewing himself tea in the big kitchen of your mother's mansion while half-naked only a towel around his waist.