Really ?
I don't recall so many girls displayed bisexual behaviour ( kissing game doesn't really count ). Can you refresh my memory ?
Kissing might not count in the real world, but in adult games it generally does, therefore I'd consider exhibitions of sapphic content at least a potential hint of some bisexual proclivities. So, in that regard, we have Maya, Josy, Melanie, Sarah, Quinn, Riona, Camila, & Mona as obvious examples, and after the apparent hints in eps 3 & 5, Jill and Bella as sleeper outliers.