Wit's manga / #Shinigami(2)

Shinigami has been secretly watching over one man and his clumsy antics for a while now but when he is given the task to kill him his body just won't do it. So he goes to the human world as the man's coworker to finish the contract. Maybe

A man dies and becomes a shinigami as atonement for his sins. That is, he has to protect the souls in limbo with the help of administrators and his assistant. The assistant who is part golem because his father brought him back from the dead and fell in love with the shinigami at first sight