MTL - The Legendary Mechanic in Marvel Universe - Chapter 50 found it

A Hentai World is a Dangerous Place, Especially if Your Best Friend is a Hentai Protagonist and You Are a Trap.

After a catastrophe swept across the world that destroyed half of the population and countries, a mysterious force passed through the earth that affected all residents, plunging them into unconsciousness for several hours. No one knew what it was.A few lucky people have received the revelation that the world will be destroyed in ten years. During these ten years, the world is waiting for ten disasters, and the last of them will be the end of the world.Another group of people also received a revelation that salvation is in another world. This revelation opened the way for them to another world where they could find solutions to save their home world.The rescuers were young people who were not yet twenty years old. They became awakened, able to transcend the boundaries of worlds.Idan was not among the chosen ones who became awakened. However, luck smiled on his older sister.A year after the world experienced its first disaster, Idan accepted an invitation to attend a grand ball dedicated to overcoming the first of the ten disasters.That day, during the ball, he met a young girl, and some mysterious force chose him. He awakening a mysterious system—the Supreme Husband System. In turn, the girl also received her own system — the Supreme Wife System.And so, the first task he received from his system was to propose marriage to his future wife within one day!English isn't my main language, so please bear with it if you found some mistakes.

A goddess of another world who called herself Goddess Liliel gave a unique skill [Creation Magic] to the nameless protagonist who is going to be reincarnated into another world.

Although she had knowledge of Japan in her previous life, she couldn’t remember the specifics—-the girl who decided to call herself Chise, invented the [Seed of Magic] in order to increase her mana, and continued creating them with her increased mana.

The girl who obtained massive amounts of mana stopped aging, and eventually obtained perpetual youth.

The forever young loli cheat creation witch Chise brought her companion Tet, her golem daughter who can’t grow old, to become an adventurer, and traveled around various places in a different world with the safe land as a base that she personally created.

Introduction: Zhao Si, one of Wall Street’s rising rookies, has been reborn. Knowing the trend of the times, he wants to make his corrupt official father change his ways…

(ps: This story is purely made up, if there is any similarity, it is definitely a coincidence, and it is not aimed at any individual or group organization.)

- Description from novelbuddy