Re:birth – The Lunatic Taker

reiji is your typical high-school student living with his big sister ayaka. one day he stumbles upon a pair of bracelets on the sidewalk. he picks them up and tries to find the owner but gets sidetracked as a bag snatcher runs his direction. he tries to stop him but is stabbed and killed. on the brink of death he hears a voice from the bracelets “if thou wishes to live form a contract.” what has reiji gotten himself into? and what exactly does the contract entail?