I thought it was going to be like a wholesome rom com and all, but I was disappointed. Don't take me wrong, I love Aya-chan, but I wasn't expecting her to randomly be in the picture without subtle warning...
And I love the original MC, since she has more charisma being so energetic, but I understand why it wouldn't work out, not with both of the childhood friends being spineless, also the inferiority complex would make it too difficult, still, Yuu with Aya isn't also healthy bc of Aya's putting a distance and being too dependent at the same time.
So I don't see a happy ending here...