Original pen name: Zanghai Sangqiong
Before time travel, he was a technical nerd with ten thousand years of experience. He was pretty good at everything else, except that he occasionally played second-guessing.
On a thunderstorm night, he suddenly suffered from chuunibyou and ran to the roof carrying a messenger bag. A bolt of lightning struck down and he traveled through time.
[The host has been confirmed. I am system 567. I am happy to serve you.
Possessive yandere gong × heartthrob technical otaku
Shou is a technical nerd, but she is very beautiful and a heartthrob. The attacker is very possessive of the sufferer.
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Purely by chance, sometimes a chapter will be better for a few days. The first world was badly written, but the content of the second world has already been thought out. If you don't like the first world, you can wait until I update it and jump directly to the second world, it'll be fine.