Re-Birth Of A Genius. Creator/Destroyer - Chapter 1800: Deal with the Devil

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

This is the story where Urahara Kisuke died after Nel failed to save him inside Askin’s Gift Ball Delux and reincarnated in the world of DxD.

I am not sure if I can capture Urahara’s character properly so I apologize in advance if you are not satisfied.

Also, English is not my native language.

I don’t own any of the characters from the canon.

Alexander lived—and died—as a wretched, poor virgin, meeting his end as he laid in the hands of his own mother.Stricken by a strange illness, his final vow was a desperate plea: If I’m ever reborn, I’ll attack all the ladies. I'll give my canal desires more attention!Miraculously, fate answers.Reborn into a world eerily similar to his last, Alexander awakens as a Guardian Candidate—a chosen warrior destined to endure trials and serve the gods.But he has no interest in destiny. Armed with divine skills and a frustratingly incompetent and seductive system, he rejects his ordained path, determined to seize this second life for one purpose: conquering women.Now, as a self-aware, unapologetic pervert, Alexander embarks on a relentless quest to charm, seduce, and claim every beautiful woman he encounters.Will his insatiable appetite lead him to the harem of his dreams, or will his reckless pursuit bring another premature end?Join Alexander in this wild, uninhibited adventure—where desire defies duty, and pleasure reigns supreme!

You take up a student career.

Student career upgrade to lv.7

Acquired skills: primary school knowledge, junior high school knowledge, high school knowledge.

You take the college entrance examination,

You got a perfect score.

Your basic occupation has been upgraded to lv.9, and the job transfer system has been activated.

You change jobs to become a scientist, you gain R&D skills

You use research and development skills to get space fortress construction technology

You use R&D skills to gain starship technology.

You are invincible.

- Description from novelbuddy