Part-time Boss

The Princess locked up in the Evil Dragon's home is just like a yacht owned by a tycoon – it's not so much about whether it's used, but that you can't be without one. Ideally, it comes with a few bounty quests; the higher the level, the better. If there's a dragon-slaying quest, even better – that's the kind of prestige we're talking about.
If you don't have a Princess in your lair cursing you to hell every day, you'd be too embarrassed to even say hello to other Evil Dragons.
What, the King sent Adventurers to gang up on me?
Hahaha, I, the grand Level 80 Black Dragon Lord, a world-class BOSS, how could I possibly care about a bunch of Adventurers.
What! The Adventurers have already reached outside the dungeon? All of them are maxed-out big shots, and there are two heroes leading the charge! And the leader is a Dragon Slaying Swordsman! I'm done for, now what to do…
Heroes and villains, black dragons and mortals, the formidable BOSS of the game world and the insignificant streamer of reality.
This is a story about a Black Dragon BOSS player.