All the perverted Issei wants is to squeeze bountiful boobs all day long, so he's thrilled to join Kuou Academy, a once all-female high school filled with gorgeous girls. But little did the boy know that after finally getting a girlfriend, she'd turn out to be a fallen angel who'd drive a lance through his heart, killing him on the spot! Luckily, the beautiful and busty Rias, his popular classmate who's actually a demon, revives him under one condition: that he'll become her servant. Now, Issei finds himself in the middle of a fierce chess game between demons, fallen angels and exorcists, and the fates of his new friends lie in the balance!
Hiro Hiyorimi is a boy who moved to the city to live with his sister; but as he was walking around town one day, he sacrificed himself to protect a girl from being hit by falling beams, and subsequently lost his life. Her name is Hime, and she is a princess who has the power to revive the dead with the flames of life. In return for reviving Hiro, he must work as a servant to protect her from any harm that comes her way. Yet even though Hiro now has a partially immortal life, his flames of life must be recharged daily or he will die yet again. Hime’s life is targeted by her siblings because the throne of the royalty is at stake, so Hiro must step up as a faithful servant to protect her life at all cost!
If you like demons, contracts, male main characters who comes back from the dead, list goes on. If you like High school DxD or Monster Princess (Kaibutsu Oujo) You'll like the other; they have simular plots, a princess (or siblings who fight to be the prince/princess) who can bring dead humans to be underlings and do their bidding.
High school DxD has more echi, fan server, some comedy, and is like a harem.
Princess Resurrection has more blood and violence.
Boy ends up as a servant to a powerful supernatural being? Both High School DxD and Princess Resurrection are two peas in a pod.
Natsuru used to be a typical student with a crush on Kaede, one of the school idols, until one day he awakens to discover that he’s turned into a busty girl! Having been chosen to become a Kampfer by the mysterious Moderators, Natsuru is now required to not only fight other Kampfers, but also to transform into a girl while doing so. Aided by a stuffed tiger, Natsuru must now battle it out with other boobalicious babes and continue to try to get close to Kaede – a task that will now be easier as she’s fallen for Natsuru’s female form! Can Natsuru keep his secret safe while maintaining his double life?
Ever since Tomoki was a boy, he’s dreamed that the girl he loves vanishes into the sky. However, while he’s convinced it’s just a dream, his classmate Sugata is convinced that it’s related to an alleged ‘new continent’ that’s floating around the planet. According to Sugata’s calculations it’s set to pass above their town at midnight, and sends Tomoki to check it out. Little did Tomoki know that at that moment, a scantily-clad angel would fall from the sky! Calling herself a pet-class Angeloid named Ikaros, she promises to fulfill Tomoki’s every wish. Now, Tomoki is able to manipulate panties and do equally as perverted things with ease; but what is Ikaros really here for, and are her motives as pure as they seem?
Both have certain themes such as fan service and humor as one part of the entertainment. But there is also a more serious side that heavily interweaves with the main character's personality. While I think the extreme personality split in Sora no Otoshimono was too far apart for it to be easy to believe when the characte rmade the switch from hentai pervert to serious hero, High School DxD's protagonist has a much smoother transition. DxD also has greater reliance on values and themes such as chivalry, with a very interesting battle mechanics (chess pieces).
Sora no otoshimono and Highschool DxD aren't exactly the same, but when it comes to semi-naked beauties they both pull it off exquisitely. They both have a good amount of humor, but Sora definitely has more. They have different focuses on the main plot, but the feel is very similar. They are both A+ in my book.
Seven years ago, Kakeru’s sister killed herself, leaving him alone. Now a teenager, Kakeru lives a quiet life with his friend Yuka and other classmates – but things change forever when he and Yuka are mysteriously transported to a frightening parallel world filled with monsters and a deep crimson sky. Though they manage to escape, Kakeru soon discovers that they aren’t alone; several other students at school also travel to the other dimension, and armed with powerful weapons they battle against its dark inhabitants. Why must they fight, and what is their purpose in the Red Night?
I think both the animes have similar parts to them. Both animes is about a normal world and a hidden world for the ordinary people, but in 11eyes the world is closed to the ordinary people while in High School DxD the world is just simply 'hidden' but open to normal people.
Both main characters have this big power hidden within them and through the serie they develop the power, but is causing damage to their body.In both animes the main characters is both set to protect a girl and due to that they desire to become stronger in order to be able to protect their loved ones.
Shido Itsuka was born in a world where widespread catastrophes of varying size called spacequakes can happen anytime and anywhere, razing everything in the vicinity. When his city's alarm forewarns one impending, the teenager races to his sister Kotori in an attempt to rescue her. But upon his arrival, the spacequake transpires in that very spot, and standing in the middle of the destruction is a beautiful sword-wielding girl. Soon after, he learns she is one of many beings called "Spirits" who cause the disasters, and charming those like her is the solution to preventing them. Effective immediately, Shido must date Spirits and make them fall in love with him, because if he cannot, mankind's destruction may very well be inevitable.
Both series feature supernatural girls forming a strange harem around a central male character. While the type of supernatural creatures differ between series both share similar character tropes and body types. Both series also feature a grand overarching conflict. Date a Live is more straightforward and more by the tropes while High School DxD does try to at least stir things up a little. If you have seen many Harem anime Date a Live holds few surprises for you, if that turns you off; don't watch it.