Hmmmm... I'm trying to see this whole situation from Nene's perspective here, but it's rough. She hadn't been this spiteful at the start I feel. It might all fall in place if we actually find out her reason for breaking up, but for now I see nothing but cruelty and pressuring someone who is clearly not ready into a relationship.
I knew that Kou had already made up her mind the moment she took that picture, but she only realized that for good by the end of this chapter. I don't see any solution to the problem yet, but maybe she can find out more by being closer to Nene.
Senpai took another photo of Amane in pain... and she said that the photo Kou showed her was something she had never seen from Amane before. This just tells me that she never saw her truly happy ever since childhood. Does it make her envious? Or does she really prefer Amane's suffering, because it makes for the best pictures?
Either way, exploiting someone's heartache for a contest is wrong. Amane isn't modelling.
But indeed, real emotions make for the best pictures...