I Was Possessed By An Unknown Manga - Chapter 25: The importance of communication

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates

[Ding!][Acquired the Dragon Queen's Legacy][Acquired the Elf Queen's Legacy][You have awakened the Strongest System]“It's real...! Isekai is real!”******Drax is a laid-back, calm and collected highschool student who accidentally loses his life on Earth and, in turn, has his soul is summoned into the body of a baby in another world, one where mana and magic abound.Blessed with a Dragon Legacy, an Elven Legacy and the love of two mummies, Drax decides to enjoy this second life being free and lively freely, not conforming himself to any world system.“The only way to be the freest person is to also be the strongest person,” Queen Freya said to him.And so begins Drax's journey to become the strongest and freest!

Entering Tokyo in the bubble era, in this strange era, the only familiar ones are Matsuda Seiko, Nakamori Akina, Kudo Shizuka…

- Description from novelbuddy

One minute, she was spiraling out of her scooter, watching in horror as her fried chicken flew into the horizon. The next minute, she was signing the contract to become a mother to his sons while staring into his glacier blue eyes.“The contract is effective as of now” He announced, as he dropped the pen. His brow was lifted challengingly and his voice reverberated around the room, bounced and sent zings of electricity down her spine.She tilted her head to a side, studying him covertly as she smiled menacingly. She was going to make him regret his decision.Let the games begin..!