I'm not even fazed by the fact that Aika is the winner/lover at the end. whenever it comes to these kinds of setups to where mc has all sorts of variety and personalities to choose from, the winner is always either the most modest one(in physique but not necessarily in personality cuz some winners are the typical annoying friend ), most plain/normal, or the famous "First girl". The girls that never seem to get it are the ones that seem to not fit within japanese social standards(ie. girls that outwardly show their affection to mc all the time, the slutty/seductive enticers, brave enough to openly confess, etc and as someone brought up this character almost never wins because that would be too "easy"). Also mc is almost never a boobsman when the time begins for him to choose.