Nano Machine - Vol. 2 Ch. 224

[MangaDex]

 

[mokonaarappa]

yeeaaaahhh another arms added to collection

 

[vannn]

This man needs arms like his morning coffee

 

[Sollertia_]

Author not beating the arm fetish allegations

 

[Leanderr]

"A match made in heaven" gets his arm cut before he can even finish his sentence, I think "a frog in a well" fits you best