※Title changed.

A story about the final boss of the first game, who skulks around pretending to be a hero in the shadows, and beautiful girls exiled due to the current party-expulsion trend, as they rise to power.

A former Japanese young man was reincarnated as the final boss of the first game in the popular RPG series, 『Last Almagest of the Doomed World』, which had about seven titles in total.

By the time he recovered his memories of his past life, he was already in prison, just moments away from being condemned.

Moreover, the formidable power the final boss possessed had been destroyed, and even many of his spells were sealed.

Ultimately, his resistance proved futile, and he was forced into exile from the country, yet he was spared execution.

The reason being, the world of the first game actually featured a multi-ending system where the final boss's fate was determined by whether a specific item was used or not.

And so, now free in a sense, he decided to make the most of this chance and thoroughly enjoy this world.

The country he was currently in was the stage of the first game, but this world still had many sequel worlds.

While the first game's world ended with a regrettable outcome, with his knowledge cheat and the power of the strongest final boss, he might be able to replace the second game's protagonist and operate as a shadowy protagonist in the second game's setting.

Furthermore, if this world truly is *that* world, he might even be able to acquire *that* strongest item connected to the multi-ending.

With that, his sealed powers would be revived, and he would gain the most fearsome power in history.

Having decided so, he headed straight for the southern forest to retrieve that item.

What truly awaited him beyond that point?

As he put it:

「Becoming a Great Demon King who completely destroys the world is a bit hard to stomach, so it would be absolutely amazing if I could barge into the second game's setting, hide my true identity, mow down enemies left and right with my ultimate power, and, playing the part of a hero of justice, blast away all the villainous mobs and the second game's final boss!」

「And maybe, depending on the situation, I might even take down the incompetent king from the first game or the original protagonist of the second game, but let's consider that just part of the fun!」

※Please note that the title may be changed as appropriate depending on the situation.

※The rating is a precaution.

※The abbreviated title is 『Last Boss vs. Last Boss』.

※Also published on Kakuyomu.