I Was a Waste and Invented a Time Machine

[Retrospective, cool article, funny, no wisdom, no saint, childhood sweetheart is a villain, has CP] The male protagonist may appear later! ———————————————————————— A meteorite fell from the sky, and Sang Yu was ordered to study it, and unexpectedly discovered the wonders of the meteorite from outer space. Fluctuations in space and time. She invented a time machine, but her childhood sweetheart stabbed her in the back and told others about this invention that was enough to shock the world and start a war. Countries and people are crazy about this time machine. War rages. Who doesn't want to go back in time and change the present, and change something that could destroy their life? Sang Yu stood in the laboratory and looked at the devastation outside, and started the time machine... If you can, then leave everything to yourself.