If you liked the School Days anime, the Anime-Planet community thinks you'd like:
In a dark and dreary dimension, the mysterious Black Rock Shooter roams the desolate landscape with her gigantic gun, pausing only to battle against other mysterious super-powered girls. Elsewhere, a teenage girl is excitedly preparing for her very first day of junior high, eager to begin her new life of attending a basketball club and befriending the elegant new girl. But what exactly is the connection between these two worlds?
For some reason, these two anime really reminded me of each other. Alright, School Days does not have any battle scenes and Black Rock Shooter doesn't have any ecchi. But the atmosphere was quite the same; it starts off (at least, the school part in BRS) all cute and happy, but turns darker and darker, and eventually, you're not sure or the series will have a happy end. If you liked BRS or School Days, you might want to check the other one out as well.
Fifteen-year-old Ichigo Kurosaki is a typical teen with fighting skills, two caring sisters and a special trait: he can see ghosts. However, when Ichigo and his family find themselves under attack by a huge beast, Ichigo discovers that there’s more to the supernatural world than the everyday specter. Vengeful spirits known as Hollows roam the world in search of devouring souls, and Shinigami – soul reapers – work tirelessly to defeat them and guide normal ghosts into a place called Soul Society. Ichigo valiantly fights the Hollow that threatens his sisters, but on the verge of defeat a Shinigami named Rukia gives him her powers, turning him into a Shinigami himself. Ichigo must now adjust to his new life of both vanquishing and saving souls for the sake of Soul Society.
When a group of children discover a strange cave at the beach, their lives are forever changed. Inside they find a hide out filled with computers and a man named Kokopelli who gives them a curious offer: to participate in a special game in which they save Earth from fifteen giant monsters. To defeat the invaders, he will give them a powerful mecha of black armor. The children eagerly sign the contract, name their new weapon Zearth, and must now take turns to pilot it; but the 'game' is in fact all too real and the consequences of battle become the stuff of nightmares. With no option to cancel the contract, is there any way to stop the game before it is too late for all of them?
Are you tired of happy endings? Do you want bunnies to supernova into a sea of misery, with orphans kicking around washed up pop cans along it's beaches? Would you like some constant angst and melancholy to carry a series to it's end? Fantastic! Then by all means check out Bokurano if you enjoyed this about School Days, and vice-versa.
Yori Yuki has loved his twin sister ever since he can remember. While his parents brushed it off as a child’s fantasy, he always knew it was true love; but because it is incest, taboo, a forbidden love, he did his best to eliminate those feelings. 15 years have gone by and his feelings never wavered; in fact, they have grown stronger. He’s watched his sister Iku grow up and become a beautiful woman, and now, he can no longer contain his feelings – Yori confesses. Yet even if Iku reciprocates his feelings, that doesn’t change the fact that they’re brother and sister. Can forbidden love last?
Both anime handle the subject of forbidden love (albeit in very different ways.) In both anime you're meant to sympathise with the under-dog and both anime aim to make you think a little differently about what it means to love someone.
On an island where cherry blossoms bloom all year-round, love seems to always be in the air. It is in this magical atmosphere that Asakura Junnichi lives, and when he dreams he travels to the dreams of others, rather than have any of his own. In everyday high-school life, he is accompanied by his adopted sister, Nemu, and an eclectic group of friends including a j-pop idol-in-the-making and a girl they knew from their childhood. Promises, and magic, and love -- Junnichi seems to dream about every girl he knows, but which girl dreams of him...?