There are Animes that create a story and then continue to add Fanservice and then there are Animes where the basis is the Fanservice and you add the story later. Ore dake Haireru Kakushi Dungeon is definitely the latter, but it's well aware of that and therefore is able to keep up with a pretty good sense of Humor. If you just want to watch something with Waifus, boobs and some comedy in it and don't expect too much animation etc. This is pretty much it. The story is a solid 6/10 the characters are like a 7/10 but overall if you just want some ecchito kick back and laugh at this is pretty much what you're searching for.