A Warm Gravestone

[This story is BL] Born as the "administrator" of the world, I grew tired of my endless existence and eased my boredom and loneliness by engaging with humans as their enemy. I came to be called the Demon King by humans, and heroes began arriving again and again. Just as the exchanges between the Demon King and heroes had become standardized, that man appeared. This is a participating work in the Twitter #Let's Play with the Same Title campaign. (The project recruitment has ended)