What is this manga from?

I'm pretty sure that's fanart/doujin art of Hikaru no Go,,

If you're interested in the pairing, there's a bunch Djs here of Hikaru x Akira, tehee

I just realized you might be talking about the art made at the last page, if that's the case - it's art for "The S-Ranks That I Raised"

Thank you so much!!