Regressor Instruction Manual - Vol. 2 Ch. 54

[MangaDex]

 

[tomonoshi]

Ayo thats definitely kiyoung under that mask. Finally got a taste of how he ended up on the first timeline. He's one of those.... lets say.... kingmakers? A person upon which timelines split? Hyunsung, be grateful. You have the most powerful ally by your side, but can you take revenge?

 

[Nomis_Nevets]

I had a little suspicion at first, but maskman is definitely Kiyoung huh.