Kinda wrong, most of the girls know they aren't the only ones, the ones that don't know are only Ami and Chika, which althought they are the most against is still 2 out of all the 7 Sensei is with, the ones that know are Ayane, Futaba, Kirin, Makoto, Maya, Miku, Rin, Otoha, Noriko, Nodoka, Io; and I believe Sana and Uta think something is up, but are not certain. Tsuneyo and Yasu are pulled by "Hope" or some other g̶o̶d̶ and also "know". Molly probably fantasises about it a lot,Touka is kinda oblivious, but is feeling the pull, and Yumi very highly suspects, but has no proof.