Mitashite Cerberus

Charon, the ferryman who transports dead souls to the underworld, is a miserly man who spends his days collecting fare money he can't even use from the recently departed. His daily life changes completely when he meets Cerberus, the three-headed watchdog of hell. To keep out the cold, he commands Cerberus to become a blanket, and in return, he pets the monstrous creature - but Cerberus asks for even more skinship...!?

(Source: Futabasha, translated)

Note: Includes one extra chapter.