Stuck in hell with you (Akaza x Rengoku)

After dying, Akaza ends up - unsurprisingly- in hell. Though what does shock him is that the flame hashira Rengoku also ended up there. A weird romance between a bored demon and a human who gave up making him go away. And shinobu shows up at some point too. This is my first story, so please don't mind any mistakes th...