Idk if I'm the only one who feels like Yuzumori is actually going to smile. Like, she thought Mimika "changed" but now that Ririha confessed I vote for a scene where she would be more relieved that Mimika was just forced to act the way she did - rather than hate Ririha. She just feels too mature to continue the petty rivalry.
Another angry Yuzumori will still be something to look forward to though. :)