Ruriko slaps her after the kiss and is surprised that Kurumi apologizes. Also that uh laughter on pages 102 and 103 doesn't really look like laughter.
In general, the past few chapters were awful. I get why they were there, but we took a fun date turned it into a drama, and then resolved it in the most hand-waving way possible. If it was that easy why even make it a 3 chapter chore to go through?