Anyone who tries to claim some of the girls aren't bi after this chapter are full of it. Seriously, Nano was about to make a dying confession to Shizuka thinking they're gonna die. We have had numerous moments of Hakari and Karane having UST to the point of getting a ship name in the manga itself, Momoha has kissed Mai on the mouth and Mai works best when it comes to caring for Momha, Momiji had a ZING with Hahari's butt, Hahari openly lusts after the girls just as much as she does Rentarou, Meme is heavily flustered by Mimimi and seems to have bi-panic with Kurumi and Tama, and Mai's feelings for Mei are clearly more than just platonic. Stop writing it off as "yuri gags" and just accept this isn't a harem, it's a polycule.