The supporting character's harem is very normal - Chapter 328 Thank you, Akna.

God rewards hard work, and there must be rewards for paying.

And no matter how hard you work, you will gain 100%!

So, for things like cultivating immortals, don’t you just need to have hands?

- Description from novelbuddy

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

Derek McCoy was a man that since his youth had to face many adversities. Often forced to settle with surviving rather than living, had finally found his place in the world, until everything was taken from him one last time. After losing his life to avenge his brother, he reincarnates until he finds a world worth living for, a world filled with magic and monsters. Follow him along his journey, from grieving brother to alien soldier. From infant to Supreme Magus.

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Tags: Transmigration, Male MC, Western Fantasy
Schedule: 1 chapter per day
Chapter Lenght: 1700 - 2000 words but usually are even longer
Warning: The MC is not an hero nor an anti-hero. He is a broken, cynic and misanthropic person looking only for his own gain. If you are looking for a forgiving, nice, MC that goes around saving people in distress, this is not your cup of tea.
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I don't own the cover but wasn't able to find the author.

Ernest Quelt, the alchemist renowned for his unparalleled mastery of alchemy, has perished.But his death wasn't a noble sacrifice in battle, nor the result of a failed expedition—it was a betrayal. The very comrades he trusted most turned on him, driven by envy of his growing power.Yet fate wasn’t entirely cruel. With his final breath, Ernest's gaze fell upon the tube that contained his greatest achievement: a perfect artificial being known as the Homunculus.More than just a vessel resembling a human, this creation harbored the power of a catastrophic beast—one that had once nearly brought the world to ruin.