Responses
I don't know about the others but the one chapter with the girl who was tortured by three guys during 30 days is inspired by Junko Furuta's case.
I advise you to not read/listen to much about this story if you have faint heart because it's truly sickening.If I could go back ,i would rather not know at all about this case.

the first chapter was inspired by that case, right? ╥﹏╥
man.. i always avoid reading her story again because it makes me feel so bad for her ╥﹏╥