MTL - You Used to Be My World - Chapter 15 I am the first to bear me.

Han Ze’s biggest wish in his life is to have a child. However, in the interstellar era with low fertility value, this wish is very slim, and his life has not been realized at the end of his life.
After his death, due to his obsession, he was bound by the almighty dad system, traveling through different planes to be a father to those children who were in urgent need of help.

Patriarchal Dad (Completed)
Upstart Cheating Dad (Completed)
Abuse Dad (Completed)
Playful Daddy (Completed)
The Last God the Father (Completed)
Father and Father (Completed)
Sick Daddy (Completed)
The troubles of Lord Han (Completed)
……

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- Description from novelbuddy

When a cold and crafty girl travels into the body of a foolish, man-crazy, young female aristocrat, what will happen?

In a world where everyone has the chance to ascend to heaven and claim the title of the No. 1 God by touching the Stone Tablet, battles rage across the three realms—Heaven, Hell, and Earth.People fight fiercely to climb to the top, each striving for ultimate power and dominance.But me? I’m Ragnarok, and I’m not really interested in godhood.My best friend, Jason, however, has always dreamed big. He wants the two of us to become the Duo Gods of the Universe, with one of us as No. 1 and the other as No. 2.Jason is like a brother to me, and I’ve always had his back. So I’m just going along for the ride, supporting him as he chases his dream.What neither of us knows is that I’m the strongest being in existence—a power even I’m unaware of.Join me on this thrilling journey to godhood as I uncover the truth about my strength, fight alongside Jason, and face challenges across all realms.

A former sporting rifle shooter genius transforms into the ‘Juvenile Butcher’. While originally supposed to have received the death penalty, he was instead fortunate enough to have entered a secret and highly regarded armed force, throwing himself into the ‘Nirvana Project’.