Chihone no Shanikusai - Vol. 1 Ch. 2 - On Your Right

[MangaDex]

 

[Pentium_MMX]

Brr... that's creepy all right.

It reminds me of the one-shot, Look Me in the Eyes When You Talk, which, while being different, shares the feeling of isolated dread.

 

[jamesglordduhs]

Cap and Falcon gonna be so pissed.

 

[daywithoutgames]

the mangaka probably got the idea from this doraemon chapter : shadows become real humans , and humans become shadows : https://mangadex.org/chapter/17969/1