We last left off with Kaede Seto confessing his feelings to his boss, the coffee shop owner, Rio. She laughs it off as him saying that she is glad that he likes her as his boss at work. We later see a panel that suggests she understood exactly what Kaede meant, that he had romantic feelings for her, and that she played it off that way to avoid the situation.
Tsubasa has a haircut. It's the explicit cliche of getting a haircut after a breakup. Remember Aya? You don't remember Aya. That's the name of the girl who was classmates with Kaede in middle school, who had told Tsubasa about the rumors.
Tsubasa explains to Momoka and Aya the reason why she is no longer in a relationship with Kaede. She doesn't reveal the extent of his past, merely saying that she thought he was dirty and that he did it willingly and that the extent of his past was more than she had thought.
Aya is pissed at Tsubasa, and in my opinion, rightfully so. Aya reveals that there were multiple rumors going around, including that Kaede had been the victim of sexual abuse. She says that Kaede had done nothing wrong, and yet Tsubasa has blamed him. Aya asks if that makes Tsubasa just as bad as an abuser.
Aya then explains that everyone has such sexual experiences, that it is completely "normal", regardless of what Tsubasa may think. Tsubasa asks if her inability to accept that makes her abnormal. Tsubasa reiterates that what she said to Kaede is unforgiveable, but she doesn't know what to do now, especially when she had never been taught these things at home nor in school.
Aya basically says fuck that noise. Those are two completely different things. It's not Tsubasa's fault that she thinks that way, but it is explicitly Tsubasa's fault that she called Kaede dirty and that he wanted it to happen. Saying that to a victim is a simply unbelievable. Saying that is the same as blaming a woman for getting raped just because she wore a miniskirt.
Tsubasa repeats herself, saying that she knows what she said is unforgiveable. However, she also asks why Aya is so upset when it's not her business. Aya explains that even though it is probably not the same as what happened to Kaede, she herself had similar experiences, and she can't stand the thought of people like them being blamed. Tsubasa says that no matter how much she tries to avoid it, she still thinks that way.
Aya departs, taking Momka with her and leaving Tsubasa reflecting on the horrible things she said to Kaede, with Tsubasa crying alone.