Well, i guess Kokoro wasnt always there when they were together, but to think "shes finally a genuine rival"?? Whats up with that confidence? If shes so confident why have a "date" without Riku and almost kiss Fushimi out of desperation since hes not interested? At this point even Raizou is way more decent tbh.
Things only went haywire ever since Fushimi kissed her.