A Wild Hidden Boss has Appeared!

Ren Kamijou, a genius disillusioned with everything, finds excitement once more with the release of the game "Exgate-Online," which becomes an instant sensation.

Using his prodigious talents, Ren quickly ascends to become the game's strongest player with his unique character, 'Mercurius,' famously known as the 'Great Sage' among players due to his remarkable backstory.

One day, Ren stumbles upon a significant event organized by his close friend Ruphas Mafahl and the top seven players of the game. This event is set to become a historic turning point in the game's lore. Driven by curiosity, Ren watches as Ruphas is defeated by the seven players according to their planned scenario.

Inspired by a sudden idea, Ren decides to surprise everyone by appearing as a 'Hidden Boss' and defeats all seven top players effortlessly. He expects his intervention to be noted in the game's history, but what happens next is beyond his wildest imagination.

Ren receives a request from Alovenus, a GM character, to take on a new role. Driven by curiosity, he accepts, only to find himself waking up in the game world in the body of his avatar.

Now fully embodying Mercurius, Ren must navigate this strange new world. How will his journey unfold in this unknown world?