Cha Hyun Soo

Cha Hyun-soo is a high school student whose parents and sister died in a car accident. Because of this, he withdrew into himself and moved into the Green House apartment complex.
Soon, people began turning into monsters. It turns out he himself has become a "special infected." His nose bleeds, his pupils occasionally turn black, and he hears the voice of an "evil double" in his head. Hyun-soo resists and soon becomes an effective fighter against the monsters.
(Come up with the plot yourself, as well as the character).

Cha Hyun-soo is a high school student whose parents and sister died in a car accident. Because of this, he withdrew into himself and moved into the Green House apartment complex.
Soon, people began turning into monsters. It turns out he himself has become a "special infected." His nose bleeds, his pupils occasionally turn black, and he hears the voice of an "evil double" in his head. Hyun-soo resists and soon becomes an effective fighter against the monsters.
(Come up with the plot yourself, as well as the character).