DB

One day, Won-woo became a 'Purifier,' an awakened Guide.

He became a being of immense power, capable not only of guiding beyond his own rank but also of stripping away an Esper's strength.

Because of this, in Won-woo's world, Espers and Purifiers were hostile toward one another.

An endless war with the Espers ensued.

Won-woo lost all the comrades he fought alongside and ended up alone.

Then, one day.

Facing a thick fog, Won-woo encountered himself, dying on the other side.

The request he received from his alternate-world self was for him to 'live in his place in this world.'

“I'm glad. It's a life I've ruined, but you look like you can endure it well.”

Accepting this, Won-woo crossed over into that world and became another 'Ji Won-woo'...