Er Mu
Honestly, the general concept is pretty similar to Er Mu’s last book, Release that Witch, except instead of prejudice and discrimination against the witches, this time it’s against the demons. Then you’d have the protagonist that was transmigrated from the modern world who tries to eliminate that prejudice. At least, that’s what I got from the first 40 chapters...
I can't believe this wasn't selected and no one has taken it to properly translate, the only available translation are from MTL websites, which are not so good since most of the translation is made by a bot and occasional human help, popular novels get some human polishing, but that's all, is not good enough and this series is worth the translation. it hurts this won't see the light until they make a low quality web comic of it.