Anata no Danna Uwaki Shitemasu yo - Vol. 3 Ch. 18 - VS. Oni

[Xystus]

Taken from https://en.wikipedia.org/wiki/Kogal

Roman script abbreviations are popular, for example "MM" stands for maji de mukatsuku ("really frustrating").

 

[NicholasTurner]

So Maou chan has a step sis now.