Wakura is so confident of getting into his chosen high school that he stops taking his tests. Unfortunately, he gets every question on his entrance exam wrong, leaving him to be thrown into a truck, put on a boat and then taken to Promised Island. There, he finds out that he was entered, by recommendation into a high school, not to mention he has twelve adopted sisters on the island that will be attending with him! More than anything Wakura wants to get off the island and get back to his old life, but eventually his sisters help him feel welcome. Together, Wakaru begins his journey of living and growing up with his twelve cute sisters.
Goro Mutsumi is a young man with that never seems to catch a break; he has a hard time keeping a job, has horrible luck, and continuously finds himself in bad circumstances. However, things change one day when he comes home - having been fired yet again - and finds three young girls sitting in his apartment. They're the reincarnated angels of his deceased pets, and they're here to turn his luck around given how well he treated them in their past lives. While the idea sounds like a godsend, things don't go quite according to plan; the angels tend to cause more harm than good, and twelve altogether end up joining Goro's cramped household! In addition to learning how to co-exist with his newly acquired roommates, Goro must also defend them and himself against four sacred beasts who are after him for mysterious reasons. One thing's for certain: Goro's life will never be the same!
In both of these anime a kind man suddenly finds himself with twelve girls of varying ages. They both have to struggle to come to terms with the situation they're now in and try to look after these girls.
Both anime have a boy that suddenly becomes surrounded by tonnes of girls that want nothing more than to make him happy by any means. Angel tales is more fantasy as the girls are angels of his past pets where Sister princess is just about a boy who suddenly gets lots of sisters. Mindless cuteness and random acts of sillyness prevail! If you liked one check out the other.
Chitose Hitotose was orphaned at a young age and is now in high school. He yearns for a family and a place to belong, but his long years of independence and isolation are setting his feet on a dangerous path. What is the solution that his teachers conceive? He needs a mother... but it's not just one, but five "Mamas!" Absolutely no one can discover that his teachers live under his roof, and he has to hide the fact from everyone, from the class president to the principal! With their maternal instincts in overdrive and mysterious pasts, can Chitose learn the lesson of happiness?
These are both very cute and warming harems, where the main character is a bit stressed over the females that he lives with. They are both lovely animes with just enough random events to keep you entertained. To me, they seem extremely similar.
Eighteen years ago, the Platinum Tiara, which gives its wearer magical powers, was reassembled. At the same time, five "Princesses" were born, to the worlds of Earth, Heaven, Celestrial, Fairy, and Hell. These five princesses quit maturing at the age of 10, and are all competing to become THE Platinum Princess so they can grow up. This story is centered on Yuuchi, from the kingdom of Earth.
Deep in the mountains lies a library with the same name as one of its caretakers, Kokoro. With her sisters Inna and Aruto, she strives to uphold the best characteristic of a librarian -- to help users with all her heart. Join young Kokoro as she starts the journey to become a full-fledged librarian, while learning about life, and being the best she can be.
Kamishiro Maiku was abandoned at a very young age. He has no family with him, only a picture of his old house. When he happened to see that house on the news, he went to live there, searching for home. What he found was that he was not alone. Joining him was not one, but two girls, each with the same picture he had, each thinking themselves his long-lost twin sister. Unable to abandon them as he was once abandoned, he shares his home with both until they can find out who is really his sister.