These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Dude, Not Funny!: Yasuke telling Akari, the girl he had a crush on for the entirety of the story, that their date that lasted the entirety of chapter 37 was a rehearsal for the real dates with the goddess after having fun together for an entire day. Even if it's so he can understand girls' mind better so that he can eventually stop his soul from growing weaker to the point of killing him, not telling her about it and letting her get her hopes up was a huge dick move.
He did, however, also told her before the date, but she was so overwhelmed about being asked out by him, that she just didn't pay any attention. Hence he though that she knew this was just a practice, from the very start.
Fetish Fuel: Quite aside from the lip locking and inevitable bath service, the goddesses in their gauzy, diaphanous "god-wear" are something to behold.