I think I ran out interesting or atypical manga to read.

So, I'm looking for manga where lovers or close friends become rivals (like competing for Sales in same or different companies; sports games; etc). Any recommendations (I tried to see if there was a category tag for it, but there wasn't). Thanks in advance =)

No to hentai, shota, bondage, yuri, shoujo-ai and nothing too dark.

I quite like the rivalry thing too! The only one that comes to mind at the moment is Kawai Touko's Loveholic, will update if I recall any more ^^