Okay, you've got a male protagonist who's pretty good with a sword. Plus, he ends up attending a female-only academy that trains royals to be Drag-Knights. To put it simply, Undefeated Bahamut Chronicle is an anime like Hundred in that regard. You've got a guy whose pretty skilled, and he's surrounded by a bunch of beautiful women.

You probably already know that Hundred is as harem as a harem anime can be, right? If you're into harems with a similar feel, then you're gonna love this one. Date A Live follows the story of a boy named Itsuka Shido. He comes across a very dangerous girl named Tohka and the only way to stop her is to date her. 

In Hundred, Hayato is the only guy who can wield 'Hundred.' Well in Absolute Duo, the main protagonist is also unique when it comes to his ability. Compared to other Blazers who can materialize their souls into weapons, Tooru Kokonoe's Blaze turns his soul into a shield. Even with an irregularity, he learns to use it to his advantage.

Well, it pretty much looks like almost all harem animes similar to Hundred involve main characters who are still in high school. Plus, it seems like they're the luckiest guys in the world 'cause they have all these women fighting over them. The Irregular at Magic High School is just like that and even more with all its quirky and fun moments! 

Trinity Seven is a rom-com anime that's seven times better than your usual harem and it's all thanks to the seven awesome girls in the trinity. It's got all the harem elements of Hundred and it's got a formidable plot mixed with hard-hitting action. You're definitely gonna want to see this one!