Kotoha, when drunk she declares that she "likes girls" and then gets touchy-feely with Hime. In both a small sketch and a short breather chapter, it shows that Yae wants Kotoha. Kotoha and Ao have also been shown with something of a Romantic Two-Girl Friendship including sleeping in the same bed when staying over at one another's homes, and it's Ao that she embraces quite contentedly after trying to flirt with Akina to see what it was like, then deciding she much prefers girls.
Hime and Touka sleep together (not like that), take baths together, dress each other, and ditch the guy they both like to go home to take a nap together. While holding hands.