When the opening page says "Following in his footsteps... even now" followed with Rin asking Urushi if she is into Ayumu, I was kind of hoping for a slightly different love triangle...
Obviously, at this point Rin won't be able to score a point on Ayumu so I don't think this is going to be a true love triangle, but I bet when Ayumu gets to where it seems he can beat Urushi then Rin request a kendo match from Ayumu for thanks, somehow score a point, then confess and get turned down.