I Was Possessed By An Unknown Manga - I Was Thrown Into an Unfamiliar Manga

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

The Mc reincarnates in a world of magic and adventure as a Leech, follow his adventure in this mysterious and exciting world as he goes from the weakest creature to the shadow being that everyone is afraid of. Will he pursue the path of strength alone? Or without realizing it he will become the king of the greatest empire that ever lived.

The world of Anexia is rotting. The Mist has taken hold over entire continents and continues to spread, not content until the entire world is under its control.Raorka, along with his mother Zoe and father Zack, are thrust into this world after an accident. However they wake up at different parts of the world.Raorka wakes up near the Domed Town of Temuril, where inhabitants speak of the cursed dragon in the woods and the exiled witch who teaches magik...for a price.Zack wakes up near the town of Odania where the red cloaked Chianti Hunters battle against the tyrant mayor and the last Great Kingdom.Zoe awakens near the abandoned Church of Laments, where the cries of persecuted nuns echo, praying for the return of their Goddess and her blessings.Now they journey separately, desperate to reunite with each other amidst the chaos of a dying world.

This is a time of great powers: The vast Persia, Sparta that was founded by force, Athens with its trade and business, Thebes the rising star, The ambitious Macedonia, The twin heroes of the Western Mediterranean, The rising Rome and so on.

This is an era of brilliant stars: Agesilaus II – the last king of Sparta, Epaminondas – the Rising General of Thebes, Philip II – the founder of Macedonian’s hegemon, Dionysius – the tyrant of Syracuse, Camillus – the Roman dictator and savior…

This is an era of contention among a hundred schools of thought: Plato – the great philosopher, Antisthenes – founder of cynicism, Pythagoras – school of number, Democritus – the encyclopedia scholar, Hippocrates – the father of western medicine, Aristophanes – the great dramatist…

What will the hero bring to the world when he comes to this age as a humble mercenary through rebirth?