Trying to remember the name of a manga I read a few years ago. It was about an otaku that meets up with two of his classmates from grade school, one of them being the girl he was in love with. He ends up going back in time to when he was in grade school, then fucks his classmates and kills the kid that bullied him, and some other people too.
https://www.mangaupdates.com/series.html?id=98592
>>381629
That's it, thanks anon.