>>5 Tamen de Gushi is one of my favorite webtoons! There's an ongoing yuri webtoon that is also quite popular.
Name: Mage and Demon Queen
Website: https://www.webtoons.com/en/comedy/mage-and-demon-queen/list?title_no=1438&page=1
Status: ongoing
Description: Adventurers seek to take the demon queen’s head, but a love-struck young female mage wishes to take her hand. Join us won’t you, for this bawdy tale of love and persistence set inside a real-life RPG.