I've read so many of these, they seemed to have all merged in my mind. I can't even recall what happened in which ╮( ̄▽ ̄)╭
Anyway, for any too lazy to Google it, here's the TL site:
https://www.shinsori.com/akuyaku-reijou-ni-nanka-narimasen/
Just when I was getting tired of a normal mc traveling to backward times and wowing everyone with basic 21st century knowledge, this comes up... But I'm such a tea h*e I don't even care! I love it (▰˘◡˘▰)
here is a list of a lot more manga's like this !! (●'◡'●)ノ http://www.mangago.zone/home/mangalist/478473/
You have to understand that most of these webtoons are adopted from the webnovels and chinese authors get paid by wordcount. A lot of them run up to 2k+ chapters and because the romance novels have shorter chapters, several hit 4k or even 6k+. Authors will drag plots that can be solved in 10 chapters to hundreds or even thousands of chapters later. It takes a looong time to resolve conflicts. Even summarizing the novel will be quite lengthy. So if some scenes feel shallow, rushed, confusing and cringy, it really can't be helped. There's a lot to get through.










Guilt her into caring for you... classic yandere ( ̄∇ ̄")