Regressor Instruction Manual - Chapter 642: Crazy Crow (1)

After experiencing heartbreak from being abandoned, he enlisted in the military.

And then, he became a war hero.

The eldest son of the assassin aristocrat Tuatha Dé.

The skill, experience, knowledge of the previous life, magic, all of which grows his power as an assassin.

Excellent assassins pass through. He was usually admired as the ideal lord, and behind it wielded a blade as an assassin aristocrat.

Aidan was thrust into this word of death and magic against his will. He was weak, Frail and pathetic but his unyielding hardwork led him to the peak where he sits unrivaled, Now he tries to find other ways to cure his unending bordom.Netorase—Netorare—Overpowered—Harem—Elf’s—Giants—Incest—

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.