Ouri is an orphan who was raised by Keisei, a man he considers to be his older brother. One night, Ouri finds a strange wounded girl in the temple of the orphanage. Cold and covered in scars, Ouri initially thinks that she is dead – that is, until a mysterious talking cat tells him that she is a Shikabane – a corpse. After secretly watching Keisei heal the girl without explanation, Ouri decides it's time to leave the nest. However, he has picked a poor time, and he soon realizes that he's tangled in a strange, supernatural web. Why does Ouri continually meet this girl as she hunts monsters? What does Keisei have to do with it all and what exactly is her mission?
When the infected approached Rei and Takashi's school, it led to a gruesome blood bath that left the majority of students and staff dead or turned into the zombie-like monsters that have spread throughout the world. Together with a handful of other survivors, Rei and Takashi set forth to find their families in a world that is rapidly detoriating. Governments have collapsed, the killer disease is out of control, and people everywhere are trying their best to simply live through each day...
Beyond the knowledge of most people, the world contains a dark secret: of every person in the world, there exist two identical copies (called Doppeliners) with the same body and mind. Among the three, however, is distributed only a finite amount of fortune; should they ever encounter one another, the one with a smaller portion dies and the remainder is distributed until only one, the Master Root, survives. Keita Ibuki lives his day-to-day life as ignorant of this as everyone else until he stumbles upon a mysterious young girl named Kuro who explains to him these secrets of the world. Despite not wanting to have anything to do with her or the danger that inevitably seems to follow, their fates become intertwined and he finds that the Doppeliner system has more to do with his past than he realizes.
Similarities is mainly that it is a male-female orphaned highschool-aged pairing to restore balance to the world after something (via some big plot/secret organisatio) has upset it. Shikabane hime is much darker and grittier.
One night, Madoka has a terrible nightmare – against the backdrop of a desolate landscape, she watches a magical girl battle a terrifying creature, and lose. The next day, the teen's dream becomes reality when the girl – Homura – arrives at Mitakihara Middle School as a transfer student, mysteriously warning Madoka to stay just the way she is. But when she and her best friend Miki are pulled into a twisted illusion world and meet a magical creature named Kyubey, the pair discovers that magical girls are real, and what's more, they can choose to become one. All they must do is sign a contract with Kyubey and agree to fight witches that spread despair to the human world, and in return they will be granted a single wish. However, as Homura's omen suggests, there's far more to becoming a magical girl than Madoka and Miki realize...
Four students of the same age have nothing in common except that they attend the same elite New York City school. Kate, Rose, Clare and Rachel all belong to different cliques and hardly notice each other's existence. Then one day they gain something in common, something very important, something mysterious. They find themselves drawn together by the death of a fellow student and the secret of their own missing memories. Suddenly they are thrown into a world of hidden warfare on the city streets and are caught up in secrets which would not be believed by others. These four all have their own problems to struggle with, things that seem more important than such strange conflicts. Can they escape from this fate? The only thing they know is that despite coming from four different worlds they now have to rely on each other or die without a hope.
Shikabane Hime and Red Garden are both tales of girls who have died, been brought back, and must now fight monsters for a secret society in order to end their undead state.
They are both fairly serious in tone, with plenty of drama, a decent plot and character interaction. I am sure if you enjoyed one you will like the other.
Ten years have passed since the demise of the bubble economy, a time that polarized the world into two groups of people: the rich and the poor. In the present day, Saiga Tatsumi (a former war photographer) has been hired to investigate a secret club for the rich named the Roppongi Club, but he soon discovers secrets much darker than he’d ever imagined. With the help of a exploited goddess named Kagura, Saiga now possesses the power to kill by simply taking a photograph; but can he stay alive long enough to save her from her captors?