
Her real name is kiryu nozomi, there’s YouTube vids that summarise her case, it’s very tragic. This work and other adaptations of her life have been made to raise awareness bcuz of the abuse so many children face by their parents unaware that this is not normal like with nozomi. Mothers can be their daughters worst enemy :(

I can’t find the video anymore but you can read this
https://www.tokyoreporter.com/crime/ex-nurse-33-handed-15-year-term-for-murdering-mother-carving-up-corpse/

There’s also this in Japanese if you want they have more detail.
https://blog.goo.ne.jp/tagomago1021/e/f89b9646e67bd88e233e26def1e530c5
And this from the book author
https://www.hayakawabooks.com/n/nff57a3d2e21e
The ml is so boring omg why do the authors do this giving the 2nd ml all the personality and development for that cardboard ml….. can someone spoil plz if that’s actually the ml or if this is a hirunaka no ryuusei situation