Outbreak Compnay!!! By far... one of my favorite animes!!!! (not exaggerating) It's a Comedy Fantasy Shounen Parody.
It's about this boy who's an otaku and his mission or job to spread his otaku ways to people of a fantasy world...If you've watched a decent amount of anime.. you'll love thissssss
References towards Attack on Titan, Kuroku No Basket, Izuma Eleven, Magi and much more! Not to mention it's hilarious!!!
*phew* sorry... it's just I really love this anime :)