With dreams of becoming a high priest so as to help others, you can imagine Akuto Sai’s disappointment after being told that he’s destined to become the next Demon King. Understandably his classmates are a bit wary of him as well, although he has drawn the attention of a few of the girls around school. Now, one or two of them might be trying to kill him, but a harems a harem right? Join Akuto in his efforts to prove that Demon Kings aren’t always the bad guys, and in doing so maybe pick up a few cute girls along the way. Although Testament is a bit more full on, both shows’ main purpose is to provide ecchi fan service, which they do an excellent job of. Testament and Ichiban Ushiro no Daimaou both feature a main character who is incredibly strong, but also has negative assumptions made about them, despite their desire to fight for good. For that same reason they both also have a number of delightful female followers, who just won’t leave them alone. The two shows have so much in common that if you liked Testament it would be hard to find a reason not give Ichiban Ushiro no Daimaou a watch.

How to tell if a date is going badly: she turns out to be a fallen angel and brutally murders you. After such a poor night out, perverted teenager Issei Hyodo is lucky enough to get resurrected by the voluptuous devil Rias Gremory, who also happens to be the most popular girl in school, and president of the Occult Research Club. Now part of Rias’s peerage, Issei has to adapt to his new life as a devil, though fortunately the harem gathering around him does make it much easier. Despite some differences in character dynamics, High School DxD and The Testament of Sister New Devil: BURST feel very alike in terms of atmosphere, genre and fan service. The main difference between the two is that High School DxD can come off as whacky at times, when the fan service reaches peak levels, however both still have some excellent story driven moments and action scenes. Although High School DxD’s fan service isn’t quite as borderline-hentai as Testament’s, it’s still pretty high level and often more frequent. Much like Ichiban Ushiro no Daimaou, High School DxD is so similar to The Testament of Sister New Devil that if you like one, you will almost certainly enjoy the other.

Your average teenage pervert, it all starts going downhill for Ryousuke Kaga after he meets beautiful shinagami Lisara Restall. As it turns out, he’s only got three months to live. Thankfully Lisara offers to help him stay alive, but only in exchange for his help keeping her in the mortal world. Unfortunately that involves letting her drain all his perverted energy, which sure makes reading ecchi magazines a whole lot less fun. Dakara Boku wa H ga Dekinai is yet another show based around demons which shares a lot of similarities with Testament. Once again, the ecchi levels are off the charts, with both our protagonists having a host of cute girls surrounding them, who are always finding themselves in awfully lewd situations. Although not quite as intense as Testament of Sister New Devil, Dakara Boku wa H ga Dekinai has some great fight scenes and fan service, and is a great pick up if you find yourself running out of cute devil girls (which can be a serious problem).

There are many things about Arata Kasuga that even he doesn’t understand, the main one being how he managed to cause a Breakdown Phenomenon that destroyed his entire hometown. Now attending the Royal Biblia Academy, Arata is determined to learn more about his power, and find his missing cousin Hijiri, who might be the only person who can tell him what really happened that day. To that effect, the school headmaster advises him to gather the Trinity Seven, the school’s seven most powerful mages, to aid him, and as luck would have it they all also happen to be beautiful young girls. As with Testament, Trinity Seven once again gives us our insanely overpowered protagonist, and a swathe of girls who cling to him like metal to a magnet. One of the surprising things about both series, is that unlike our usual harem leaders, these guys are totally up for it. This mixes things up a bit with the character dynamics, making them both not quite as repetitive as some ecchi series can be. With a stronger focus on plot than some of the series in this list, Trinity Seven is a great series if you want something more than just fan service.

Despite living with three of the galaxy’s princesses, being constantly chased by an unstoppable assassin, and being harassed by numerous other girls at school, Rito Yuuki does a pretty good job of living a normal life. In fact the biggest problem he has is being unable to confess his feelings to his crush, Haruna Sairenji. Third princess Momo however, has much bigger plans for Rito, harem plans. Because if you go by space rules then technically polygamy isn’t a problem. Both Testament and Motto To Love-Ru are currently some of the highest quality ecchi anime about, with excellent animation and art. Testament’s Maria and Momo from To Love-Ru are like two peas in a pod, both constantly keeping our protagonists on their toes in their harem creation plans. Although both feature very different stories, if you went to Testament for the fan service, then Motto To Love-Ru will certainly not disappoint. To add to that, with its sequel To Love-Ru Darkness and Darkness 2nd already out, there’s plenty of ecchi to go around.

Killing the God of War comes with some responsibilities attached, the weight of which Godou Kusanagi is really feeling after suddenly finding he has become a Campione, a God Slayer. With his new title, Godou is expected to take care of troublemaking Gods, a task easier said than done. But as a host of attractive young ladies begin to show an interest in his new found power, things suddenly start to look up. Acquire super powers, get girls: there’s definitely a pattern here. Both Testament of Sister New Devil and Campione see our main protagonists using their immense powers to stop evil, and acquire harems. Campione’s theme of old gods keeps the show feeling fresh, but still very similar to Testament in its genre and contents. Much like Testament, Campione includes a bucket load of ecchi fan service, excellent magical battles and a solid enough plot to keep things interesting. Campione is great if you want something a bit more light hearted, although we’d still advise doors closed, headphones on.