Sensei has finally lost her goddamn mind. And yet, she was still absolutely right about Reiji. It's funny how that works. Reiji wants to run away, but he's easily swayed and too kind, and he's repressing his own desires for the sake of others. Teacher understands that, but is projecting her own situation onto his regardless. Honestly, this is the most dangerous route. I see knife and or boat in her very near future if Rei doesn't get the fuck out of town quickly
Chako . . . I can't say I like this. She manipulated him, emotionally into sleeping with her thinking that it would make her special (and Nagi not). Now she realizes Rei's kind of a slut, and she thinks he's trash now? I'm disappointed but I had a feeling from a long time ago that this would happen. She's too trapped in her own drama to see Rei properly.
Just leave town with your mom, kid. She's about the only one who cares for real at this point.