Quote from Kitty18dnsz
There's Koukou Debut
,but it's in the beginning, and not anywhere else.
I think Narration in Seventeen
fits better, but it's a manhwa and not as long ....
The rest that I'm coming up with are oneshots. I'll try seeing if I can remember something else more fitting.
Totally forgot about Koukou Debut as it was treated as such a minor event early on while minor events were treated as major. xD
I'll add Narration in Seventeen but I don't know when or if I'll ever read it.
Quote from Sphear
Read this one but I honestly cannot remember Ao having her romantic interest stolen. I just remember it being a fake relationship in the beginning.
Spoiler (mouse over to view)
Riku later fell in love with Ao. Happy ending.