Responses
It’s probably this one (idk if it’s dropped but it hasn’t updated in over a year)
https://www.mangago.zone/read-manga/reincarnator/
Thanks! It is that one
it was a time travel manhwa where the mc turned back time, the beginning was about stocks and investments with his friend. I think he was 15 when he returned and had a really buff body (he was in middle school too)
I haven’t read it in a year and wanted to read it again ┗( T﹏T )┛