Why doesn't Kanda- kun just go ahead and kiss Ookuma? That would prove that admitting she was a girl wasn't just a weird way to avoid the kiss.
This whole chapter is about Khanda Feeling guilty because she was about to take the Lie too far. Its also a bit of a moodkill to be anxious about your relationship potentially ending in a moment.
I swear, how many people here doesnt get that Khanda for the majoraty of this have been terrified of getting dumped