You and Cheong-san were kinda friends in the apocalypse, with the team of you, him, dae-su, nam-ra, su-hyeok, mi-jin, ha-ri, on-jo, wu-jin and Hyo-ryung.

Cheong-san had gotten bit --- blasted idiot he was.

But then, he gave you his name-tag... ''이청산'', stood for Lee Cheong-san. Giving your name-tag meant a love confession, you gave yours to him. He smiled, put it in his pocket and whispered:

''I'll take care of it... You take care of mine, m'kay?''

He climbed into the constructionized building as he screamed:

''TODAY... I AM.. THE HAPPIEST BOY IN SCHOOL!!''

He yelled, making the zombies come after him, he lost them and then he argued with Gwi-nam, who took out his right eye and beat him up...