Hatarakanai Futari - Vol. 18 Ch. 1118 - Saturday Morning Air

[MangaDex]

 

[FUDGEUXFERD]

damn mamoru swore

 

[ThunderFragment]

Based on context, I think it was Haruko who swore.

 

[jipple]

Oh haha i read it as Mamoru saying "a fart you fucktard". Just realized it is Haruko calling Mamoru fucktard