To be honest, this is the only solution. Nobody could, or even should chose between the 2 best girls. So you just combine them and live happily.
Senpai! Get a hold of yourself!*whack*Onii-chan! Staggering around like that is bad! ❤I'm sorry, Nanako!*slap*......Please do it in a more Nanako-like fashion.Personaa~~~~ Kumaa~~~~