Noooo don't be wonder about that. It's realistic for everyone to be afraid to stand up, especially for being sexual abused. It's a shame for life. And to add it, she traumatized and forgot the fact that she was the one who killed her teacher. She's still afraid to be touched so of course at least she wants to protect her new life.
Nooo that's not true... this manga is written very close to realistic, that may be the factor that makes this manga not that highly rated. Almost every victims of sexual harrassment will freeze because they're in panic situation and you can read more onto this. Takahashi was in belief that he could save her by telling people lies and didn't know the affect to his family. Due to shock, this bitch forgot everything and when she remembers, she's still scared and traumatized. Anyone will be selfish in this situation. Yeah, sorry, I'm blabbering like this. The thing is, they were cornered and have no idea what's the best.
It's okay, although i started this argument i do agree with you at the fact that some people would selfishly do that just like the bitch. The only thing that i thought of during the incident in my opinion was that they should have called the teacher, Yes they were still but immature kids after all and that they wouldn't have been able to do so cause of that pedophile. All i wanted to say was that there were many options thst they could have done, but in my case I'm to lazy to try to defend and spoke out own opinion. But i gotta give it to you, the damn manga had an amazing plot that i couldn't even stop reading it till the ending. It's a shame that things kinda escalated to quickly and some of their choices might have not been to my liking but either way the manga ended it a pretty good way, So yeah..

But even if you guys told takahashi the same thing to not sacrifice your own family just to protect a stupidly selfish girl, he would still do it cause he was just a middle schooler you know... he wasn't mature and considerate enough to think about the effect from his lie. Sigh... it'll be a 1 volume manga if he was a mature boy.