So, This manga is not an isekai, It's still ongoing(it's monthly). It's about a fat hero, after he defeated the demon lord, the king asks him to give the title to the prince because the hero in question looks fat. and the hero who got fed up by all those killing just gave the title to the king and left the castle with some money. some demon folk/beastfolk kid looks like a cat tried to kill the prince during the ceremony but the actual hero stopped it. after listening to cat folk he left the country and saves a group of elves. they tey meet up with the demon king(he actually didn't kill him) and set up a plan to save the rest of enslaved demons. The demon king looks like a lizard with horns and has a daughter(small kid). I forgot the name and this manga just disappeared from my reader. Does anyone else know the name?