You Keika, a 23 year old, poverty-stricken boy, struggles to make ends meet, after his family died in a horrible catastrophe many years ago. One night, while looking for spare computer parts in a dumpyard, he runs into a young, white-haired man performing an exorcism in that place. After being told to get out of there, You Keika gets run over by a truck while crossing the road right outside the dumpyard. Later, he wakes up in the hospital and notices that he has taken on the appearance he had as a teenager, about 9 years ago. You Keika optimistically thinks that he has been reborn and is on his way to a new, better life, until Tanmoku Ki, the white-haired, handsome guy he had met earlier, appears and shatters his dreams. You Keika has actually died in a horrible accident and his soul has seven days at most to wander on earth, before disappearing for good. Tanmoku Ki, however, makes an intriguing offer. If he signs a contract with him and assists him in his duties, he will be able to remain in this world as long as Ki is alive. Will You Keika accept this contract and manage to overcome his weaknesses in order to protect the person he will grow to love the most?