They should never had made him go back a third time, they are making a new demon king here
I really like this webtoon, it’s awesome
his 4th playthough is the last one in this version of fantasia, the 5th playthrough is an alumnis' festival, the 6th-7th are in fantasia but he starts in the northern continent and lanuvel is his sister + there's extra content and the demon lord is a lot stronger, then he goes to earth, but *omitted* and he comes back for an 8th playthough again with a different scenario, there's no lanuvel and the hero of that world is Sieg.
Just AMAZING, it's just so cute, pure and awesome. I loved the whole thing!!!!!!!!!
This one just became my favorite!!!