Akebi no Hana: vol.1
Yuji Sakai's high school life is turned inside out when he discovers an alternate world beyond his own. Creatures from this world known as "Crimson Denizens" are able to infiltrate the real world, suck the souls out of humans, and replace them with false substitutes known as "torches." The only reason Yuji knows this is because a fierce little redheaded girl has just saved him from being taken away by Crimson Denizens. What he didn't know is that he's already a torch?which means he's essentially dead! Yet inside him lies a spiritual power that the redheaded girl, named Shana, has sworn to protect. If this means going to school together and even sharing the same bedroom, well, it's going to be an uneasy existence (or non-existence?) for Yuji.