I mean, it was bad enough that Koguma couldn't face Hino the next day, at least until Hino guilt tripped her (which, btw, she also did to coerce Koguma into letting her come into the stall). Unless Koguma is into this stuff (humiliation fetish...?), Hino is knowingly manipulating and exploiting her.
Having said that, they have made it explicit that Koguma isn't just doing this because she feels responsible, and she clearly has other "normal" friends, aaaand she was the one who suggested doing the cat thing again... So I honestly think she's just an oblivious unawakened pervert.