Everyone Regressed Except Me

A brief description of the manhwa Everyone Regressed Except Me:

Lee Hwayoon, one of the few players who entered the last dungeon, finds himself among the players who have returned to the past with their memories intact.

[System Error!]

[Searching for a special skill…]

[Special skill search completed.]

[Please check the status window.]

[Butterfly Effect, Level 1]

[The only person who hasn’t regressed will be awarded bonus points for your actions changing the future.]