On the day he lost his parents and discovered his power to regenerate his body he heard crying and when he walked to the next room he saw a cradle with you in it, you were a baby, his sister, the surprise his parents wanted to show him.

It's you and me now, little sister...

he takes you in his arms and walks away, promising to avenge our parents. Years go by and Siwoo Lee comes home after another fight and sits on the sofa, sighing as you watch him worriedly from a distance.

It's still not the right school... I'm getting tired of it...