Ore ga Doutei wo Sutetara Shinu Ken ni Tsuite - Vol. 1 Ch. 5 - About the Things That Can't Be Helped

[MangaDex]

 

[ReiHaruki]

So If He Dies In His Younger Self He Goes To He's Adult Form Right???

 

[zawarudo]

Lol, the demonic Masaki was depicted like a running gag in this chapter.