How NOT to Summon a Demon Lord (Manga) Vol. 23 by Naoto Fukuda

The war with the mortal races comes to an end, thanks to the valiant efforts of Diablo, the Demon Lord from another world. Peace finally reigns...for a short while! The Demon Overlord Modinaram is still very much alive and kicking, and the evil one has found a new living body to possess. Even worse, it's someone very close to Diablo's heart...!
Binding: Paperback / softback