I can't see why Rinka would fall for him because he treated her like a person, not just a sex demon. Only one time! Just because she got dumped? Just because she's vulnerable after getting yelled at for doing sex crimes? Because he's the first and only boy who treated her like that? Seems not enough.
Hey some funny art, probably unintentional, but on page seven the speech bubble where Rinka says "I'm really sorry" overlaps the stairs in such a way that the corners of the stairs look like additional arrows pointing off the speech bubble. It looks like Rinka, Katou, and Yui are all saying "I'm really sorry" at the same time. Now it creates the possibility to read the scene in multiple modes. Post-Structuralism got me again. Derrida-Damn!