Machikado Mazoku - Vol. 4 Ch. 52.5 - Extra and Volume 4 Contents

[Mongolian-Beef]

@BugDemon
"I think the string is just decoration anyway. It's not really attached to anything, so it can't hold the skirt and panties up."
Actually... the string hold the panties

Spoiler

https://s2.desu-usergeneratedcontent.xyz/a/image/1568/85/1568853157695.jpg

That page seems very fan servicy for this manga

Not that I'm complaining...