Honestly, what I think would be most interesting would be Akari's inability to confess or clearly expressing her emotions would be her downfall (akin to Asuka from Evangelion) which, when she and her original crush and Jirou gets with his childhood friend, causes her to breakup with him and eventually come running back to Jirou, leading to a heart felt interaction between the three of them as they all try to work out the situation.
This is one of the most compelling love triangles in my opinion as you do feel as if they both have equal chances of winning.