After getting Norn and having some awesome fivesome, they take off into the demon territory to meet the grill he met in the past. Meanwhile, since he will soon kill the sword hero, he gets a chance to upgrade Kureha into the sword hero. After meeting the demon lord, he helps her to powerup by searching and passing the trial of a legendarry beast Roc-like godbird. He also gets a magic egg from it, which hatches after receiving his magic (she is basically his daughter). This is the kitsune.
So while they reach the godbird, he trains Eve by making sure she hears their night activities. After passing the godbird's trial, they go to the demon capital, and take it over, making Eve the new demon lord. They find out the demon lords are always taken over by the Jioral/Dioral king's magic / Evil God, so he leaves behind Eve and moves to Jioral capital to defeat the evil god. By transforming his body into a true hero form (the original reason why a healing hero was even born is so he can bring out all heroes' true form to fight the evil god), he beat the king. Then he leaves Norn behind to manage the kingdom and goes back to Eve, who has a little trouble by scheming demon tribes. Meanwhile in all this mess Gun Hero (the rapist priest) gets a powerup from the King (he wants to make him a powerful mindless soldier, but he... dodges the bullet), and escapes into an other human kingdom. Recently, he takes off into that kingdom to get revenge against Gun Hero, this is the point where he finally manipulates the kitsune into his harem, and that's as far as I've read as the original guy translating this stopped his activities due to irl sheningans. I left out some small details but that's the gist of it.