The manga is a faithful adaptation of the light novel by and illustrated by Naoto Fukuda (and previously Tetsuya Tashiro for earlier chapters). The story is currently deep into the Fallen Elf Arc , dealing with the aftermath of the battle against the demon lord Krebskulm and the political intrigue of the Fallen.
You can read the raw Chap 122 of "Isekai Maou to Shoukan Shoujo Dorei Majutsu" on Welovemanga and other online platforms that provide raw manga chapters. The manga is a faithful adaptation of the