Ch 8 tries to promote Erika as some kind of antagonist, but all it did for me was cement my opinion that Koto is the worst. Trying to fill the void that Aya left with literally anyone, to the point where she tries asking out her own friend just as an idea. I just wish Erika said yes to Koto, just so their relationship could've fallen apart and Erika could move on.
I was kind of hoping for Erika x Aya, early on. Cause, it would be the most unexpected and would be the most different from where their feelings start (Erika likes Koto, Koto likes Aya, and Aya might like Koto back). But, it seems like at this point that's not going to be a plausible route. So, I just hope Erika ends up happy, with someone that's not Koto. Now, I'm kind of rooting for the "No one gets together" route. All the pairings seem like bad ideas at this point.