Ukyo was only 14 years old when he lost his parents, and was sent to his grandparents to live with them. One certain day he started to see strange things and creatures, and he just couldn't get what happened around him. Also that was the time he met a death angel boy, named Koe. The boy said, he has 1 year left of his life, and he came for his soul. But the death angel gave him a chance to live a longer life. They made a deal, but Ukyo didn't even know the price was of his added years. Ukyo and Koe have to collect as many souls as they can. The more the collected souls, the longer the life of Ukyo. But it's not as simple as it seems, because alongside the ghosts, they'll meet more and more mystical creatures.