A Cliché Multiverse Story - Chapter 299 - CH. 306: Mate?

Uchiha Kai has been cautious since he came to this world. He vowed that he must be cautious and go to the end.

But one day he received a mission – to cover the wave wind team to blow up the Kamabashi Bridge, Uchiha Kai knew that he was going to be unlucky…

- Description from novelbuddy

The male student, Fukai Nagamasa, ignores his studies for college entrance exams in favor of following the path to chuunibyou. As he fainted during night cramming session before the exams, he realized that he was transported to a parallel world as a feudal lord in the Sengoku Era. Not to mention that suddenly, he was marrying the sixth Demon King, Oda Nobunaga’s little sister, the one who was purported to be an unrivaled beauty?

After waking up, Vincent finds that he has transmigrated to a parallel world where monsters roam, a world that's no longer ruled by science.In this place, body practitioners can lift 10,000 tons of oil wheels with one hand, and espers can summon wind, rain, thunder, and lightning—born to be strong. Beast tamers can tame powerful monsters that become their most loyal pets.Vincent, who is just an ordinary young man, has successfully activated the Super God of War System and awakens three S-Class Superpower at the start of everything, making him a top super genius!S-Class superpower [Rapid Training]: Body is constantly strengthening every second. Even sleeping can increase your strength by 5,000 kilograms!S-Class superpower [Hellfire]: Burn everything and destroy everything!S-Class superpower [Monster Affinity]: Can communicate with any monster and tame any monster easily!Vincent has strike gold![Ding! One-handed strength achieved 50,000 kg, life expectancy increased by 300 years!][Ding! Instakilled giant monster, Nine-Headed Sea Serpent, obtaining S-grade equipment, Crimson Flame Divine Sword!][Ding! Tamed S-class monster, Storm Dragon King, obtaining a Divine Pet Evolution Pill. It can evolve the Storm Dragon King into an SSS-class Dragon God!'Vincent's heaven-defying path begins…

What was originally an ordinary day, suddenly became a historical turning point. Enormous, mysterious Cubes appeared all over the world without warning and as if Judgement Day’s spears, inserted themselves into the blue planet.

From inside the enormous Cubes, endless streams of monsters gushed out alike raging tides, utterly defeating the unguarded armies of each state in the blink of an eye.

In order for humanity to preserve its final embers, the heads of states issued orders of retreat, to no longer attack the Cubes but rather to cling to remote cities, which they turned into self-sufficient survivor bases and around which they built 100-meter-tall Walls of Life!

Many years later, while bearing the heavy weight of history, the first expeditionary force brought back a world changing piece of information. The Cubes possessed exceedingly high intelligence and they regularly transmitted mission instructions to humans nearby. The mission rewards were incredible.

Since then, humans rushed out of the confines of the walls and once more set foot on the wasteland!

- Description from Novelupdates