Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 483

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!

[Mature Content] Divorced and in debt, Elena decides to become the contract wife of three rich and famous men. A fair exchange begins between a woman disillusioned about love and men with their own demands and desires. But when they demand for more than her body, she discovers many dark truths as the past slowly catches up to her.

The Aliens descended with hostility.In the face of the Alien invasion, humans were as weak as ants.So this was the apocalypse, the true apocalypse.But where there was invasion, there was resistance.For some people, this wasn't the end times, it was war.So this was war.The real war!

This is a cliché story about two young people saving the world.