Wolf of the Blood Moon: A Blood Magic - Chapter 17Book 6:

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

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In her previous lifetime, they had married for five years. He meant everything to her, but she was thrown away like an old shoe.

What the heck? She, a famous doctor from the 23rd century, turned into a village peasant girl of a different world!

Her grandmother was cruel and vicious. Her aunt was very mean. So, to have a meal and clothing every day, she, a famous doctor had to pull up her sleeves to do farm work, treat patients, and abuse the bullies!

What? Grandmother need money for her illness? Cousin has no money to get a wife? Cousin needs to borrow money for his studies?

Roll! Roll as far as the history can go!

- Description from Novelupdates

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