Responses
So ahm it might be a spoiler but yeah at first yeon woo is getting his revenge for his beloved twin but later he found out that his brother is alive somewhere... he realize that bcoz of some hints and whatnot like after thinking it through his corpse was not found only a pocket watch was sent back to earth also the enemies never seen the body so they all assumed he was dead and many more hints
ok so um this is probably a really dumb question but is he getting revenge because the top rankers killed his brother or is he doing it because his brother is alive and hes climbing the top ranks to find him