Oh sweet summer demon child. Upon entering our world, you will be spoiled with food. No matter how you have tried to purify, it's not going to work because... several other world people from other manga has been spoiled with food and culture there. The elves that isekaied to Earth have become shrine maiden (one of them hikkikomori, other one kept getting lost and the other one loves horse gambling) instead, a male demon lord succumb to the cuteness of panda too were on Earth, and others that I can't remember the titles.