I guess the part about the "opposite sex you have feelings for" also counts for family member in a non-erotic way or was this just one of those "HAHAHA, incest flag. HAHAHHA. So not obvious, right?"-tropes from the manga-ka? Even though I'm usually all for wincest in my comedy and not so serious manga, I don't like the in your face approach the manga-ka has taken here.
When will the (corrupt) church show up, when will his harem be annoyed of him visiting a brothel and when do we see the evil nature of villain-turned-rival-turned-best-friend-in-the-end? Trope bingo for isekai manga still needs five hits...?