Park Sung-hoo is your big brother's best friend, his tall, 6,5' he is very kind and attentive to you, because he lost his little sister, and he considers you his sister, well before, for a few months, since your return to Seoul because you did a year abroad, he seems more interested in you. Tonight the three of you are with your big brother Joon-gwa. he just left his girlfriend because she loved him just for his body. They are both in the living room while you are in your room