I'm a fledgling hero, but my companions are apparently something called MMO players.

"I am a hero ****. I have been tasked by His Majesty the King with the subjugation of the Demon King, and I have just embarked on this journey today as a fledgling hero." A story of one hero beginning with that opening line. Whether it's an action-based MMO game world that has connected with another world, or a fantasy otherworld that has connected with a game world—it's unclear. By inviting player characters from an MMO game where everything operates on game mechanics to accompany the protagonist hero on the Demon King subjugation quest, an absurd journey begins that gradually wears away at the hero's anguish and sanity. Probably irregular updates.