Something That Can’t be Forgiven

"Something That Can’t be Forgiven" (許されないこと) is a short story from 's store privilege for volume 6 of 2nd Year arc of You-Zitsu light novel series, together with other three short stories.

Summary
After homeroom, near the end of her conversation with Suzune, Chabashira reminds her that what she decided to do about Kushida was the most important thing. Chabashira wasn't sure how useful her advice would be, but had hoped that it would at least provide some clarity to her.

Suzune informs her that she has already made her decision and thanks her for her advice. Chabashira assures her that she didn't need to be concerned because this was the least she could do as her teacher. After they said their goodbyes, Chabashira went towards the staff room, where, on her way, she noticed Hoshinomiya running after her. Chabashira reprimands her for running in the corridor and asks why she was rushing, but Hoshinomiya switching the topic, pointed out that she took a long time talking with Suzune. Chabashira, taken aback realizing that Hoshinomiya might have heard her talking with Suzune, inquired as to how much she heard. She was worried that Hoshinomiya might have heard something about Kushida. Hoshinomiya replied that she just heard Suzune thanking her, but Chabashira suspected that she might not be necessarily telling the truth.

Hoshinomiya notes that even the model student, Suzune, had problems, to which Chabashira responds that Suzune was still a student. Hoshinomiya, surprised, asks her when she started getting close to her students, to which Chabashira responds, saying that it's natural for a teacher to get close to her students, but Hoshinomiya adds that she's not that kind, which Chabashira acknowledges that she may be true. Hoshinomiya then declares that she'd never accept that Chabashira could act like a model teacher. Chabashira attempted to persuade her otherwise, but all in vain.