Sounds like Dai Shin You by Oshima Towa.

Dynasty has the mangaka, the pixiv linked on the author page has the characters from Dai Shin You, but not the manga.

Yeah, that's exactly it! Thanks

Hi. Guys, does anyone know the name of the manga about childhood friends that started as rivals? The first chapter was about them going to some digging competition(potatoes/radish or something similar). Then after that was a time skip with the reuniting in middle school... I think. Should have around 10-ish chapters. Any help would be appreciated.