You don't need to write everything, just make a good short summary

The world is on the brink of destruction due to a maniacal crazy scientist,not even the world governments could do something and many fell off during the initial hit,the lefovers of the American governments and top scientists flee to Japan on a last major attempt to stop him,going back in time to kill him,but due to a shortage of time before he reaches Japan raw resources and refining,the limit is ten years,the top scientist directing this in a desperate attempt to save his daughter,trains her into the perfect assasin and secretly during the same day of the raid on their base,jumps back to the mid or late 2010s,with an objective in mind,she's sets herself on the hunt for the "crazy" scientist forming on his late teens,but only finds a chuu2 wannabe scientist who has a clear objective:Unite the world and start a race to the stars,although she clearly has her doubts about his objective,he doesn't seem to be the mad scientist that he was in the future,with this in mind,she's in a dilemma,kill the harbinger of destruction or just kill an innocent unusual boy?will she be able to change this new timeline or fall into madness?
i honestly could write it,i have time to kill.
i also used Okabe as template,don't worry,i'ts more like greek tragedy than SoL,has a touch of Psychological thriller and a tiny bit of romance i guess

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a psychic, a genetically engineered man-ape super soldier, a priestess of a cthulhu cult, a cyborg, and a clown who ran away from the circus all happen to commit a terrorist attack upon the galactic trade center at the same time and decide to join forces in bringing down the plutocratic oligarchy that rules human civilization

I was going more for Konosuba meets Space dandy

It could be called Pastel/Pastel, because of the name of the food and the pastel colors in anime

same difference

Thirty Years War, but with cute anime girls.

building on this idea, the Crusades, but with cute anime girls
Saladin is best girl.

What is it with you guys and little girls? It's like you want to turn everything into a cute little girl. Why?

The demon king casted a very deadly spell which killed both him and the hero. Then they were isekai'd into our world as twin sisters.

You're just describing Magical girl spec ops