Runeblade - Chapter 457 B4 442: Imperium Mortum, pt. 2

Amamiya Hiroto is unlucky. His life consisted of misfortune after misfortune, culminating in an unlucky death during an incident on a school boat trip, trying to save a girl he barely knew. After death, he met a god of reincarnation who requested that the hundred or so dead passengers—one of them being the girl he tried in vain to save—be reincarnated into another world.

In a tyrannical world, what is evil? What is benevolence? All living creatures are brutal. Passing through the heaven road to find one’s purpose in life. Struggles to be stronger is not an easy path. The whole journey thistles and thorns, one blade chops open a path, I alone will be supreme!

- Description from Novelupdates

Dexter a teenager that always gets bullied by others at school was involved in a incident which required him to get a chip in his brain.Thanks to the help of the chip he had become smarter than the average human, leading to lots of new inventions and discoveries, and gains the ability to move through dimensions but as always there is a down side as humans get invaded by aliens in search of him.