I loooove this duo so much. It's like dumb and dumber but the cuter version. Anyway, the story is kinda interesting tho. I've noticed its kind of a simulation type of thing. Idk who the system the lust demon was referring to but it looks like a 'god' or some sort that oversees the situation & needs a little bit of fun OR it could be the humans who hold a big grudge on Naos and wanted him to break his belief. idk man