OMG it is happening
5 seconds later: it is NOT happening ¬¬
Anyways, i love, I LOVE that what she felt for haruka was just sensual attraction, however as she developed romantic feelings and noticed them ¬¬, the attraction became sexual u.u
Sooooo, demisexual/romantic ???
Ehhh, they're teens. It isn't uncommon for teens who are gay or straight or anything else to still be in the process of discovering their sexual preference and sexuality.
Also keep in mind her learned boob-fondness started in a weird zone of chastity because her cousin was literally just making up bullshit to keep from admitting out-loud that she's just gay.