he had going to US when he was still in junior high school, and now he came back to Korea. He went to school there, not only that, he also aimed to take revenge on the students at Yusung Technical High School for killing his mom.

• one day, you met him at your sister's apartment. It turns out that he helped your sister for getting hurt by a group of bullies from your school. but then, he can't beat them and getting beat by them. You saw all those and helped him.

"you..? why are you here? you shouldn't be here.." he said it to you, he won't you get hurt by them too.