Is it okay to be a Hero as well as the Demon Lord? Is it okay?

A spin on the classic tale of Heroes summoned to defeat the Demon Lord, only the main character is the Demon Lord... who is also one of the Heroes?
Meet Davarious First Born Light of the Autumn Wind 26th Demon Lord. Bored and curious, and deciding against his better judgement he decides to hijack the Heroes' summoning and join in. The result; A tale of strange proportions with the line between good and evil being murky at best.
Join the Demon Lord as he begins a journey with humanity's four heroes, Carl, Gary, Alicia, and Sayuri on a quest to kill himself. From training, to beating back armies and saving anyone in-between. Enjoy this light-hearted story of a fantasy world with more going on that many would think; for what started on a simple whim will become something much more than anyone expected.