Kitazawa and Inokawa had really different views on this scenario. Kitazawa was guilty he forced them into that scenario, while Inokawa was happy she got to try to seduce Kitazawa again. Thus, Kitazawa was more worried that his smell and reactions might drive her away. Inokawa on the other hand, wants them to be close. So she tries to make hmi drink from the same bottle, make him notice her body, and then confess!
Too bad for the both of them, they got caught by their friends. And now Higuhi and Ayame know that Inokawa is a rival! And both Egoshi and Shiratroi know that the girls like him too! Ayame's not happy about this at all. I guess she's still planning on a proper confession after it got botched last time by the gang interrupting them.