Island

Island, from Hollywood director and producer Michael Bay, is about a man named Setsuna who goes back in time in order to have sex with a bunch of teenagers. He also briefly marries one of them. Like most "Key-like" VN harem animes, all the girls have at least one mental illness, such as believing they are also time traveler, or being afraid of the sun. After Setsuna "cures" each of these illnesses, he is rewarded with sex.

The Disappearance of Nagato Yuki-chan

Is that Kyon eating a raw lemon? No wonder his life is so messed up. Dude just takes a bite outta a lemon. I supposed dealing with The Disappearance of Nagato Yuki-chan can be rough, but c'mon, man, no need to gum a lemon.

Grand Blue

Grand Blue is all about hanging out with the boys, getting drunk, and taking your clothes off. This anime embodies all that it means to be a man. Nothing manlier than sippin' some brewskis with the lads in the buff.