I didn't realize 7th Prince had a LN. I read a good chunk of the manga and really the standout feature is the art. The story is entirely forgettable. The anime is similar in that the production was a more interesting story than the actual show.
Really curious how Vending Machine will play out if it goes anime original. I feel like one of the main reasons the first season "worked" was you could tell that the author had a peculiar passion about vending machines. Not sure that can be replicated if they start doing original content.
Done!