Yukitaka has just left Tokyo, eager to transfer to Kisaragi High where he's been recruited to play baseball. However, upon entering his new apartment, the boy is met by a man with long blonde hair who claims to be… an alien?! After initially scoffing at the notion, Yukitaka discovers that the alien – Ouji – is for real, has amnesia and, what's worse, now wants to live with him in his apartment. The fact that scientists and mysterious guys in black suits are after Ouji becomes the least of Yukitaka's problems as his new guest turns out to be more than a handful to handle!
The humor in Level E is very similar to the type of humor you will get in Gintama. Level E features parody humor, just like Gintama. Both series enjoy epic trolling of their audience and characters as well. Both series are generally very funny. If you found one funny, chances are you'll find the other funny