Kaito Yazanami's Literatures

A collection of short stories about a tiefling that lost everything after deceiving the world, getting the two rival kingdoms to team up against him and bringing them peace as a result, and a demon, that the tiefling made a contract with, promising to free him from the anger that wasn't its own, that happen to decided to stick around him, taking interest on this tiefling and his actions and wanting to see how far he would really go.

Story of how Lappland met Kaito