though i'm responding months later, i wanted to say for people like "hikari" who are normal people pushed to the very edge, murder will always be an extremely regretful thing for them. even in cases of self-defense much like this one, it is very difficult for them to view their actions as acceptable because the act of taking another person's life is hard for most people to stomach. i agree that i don't think her mother would have changed her behavior no matter how hard she tried to understand her feelings, but i can also understand and sympathize with her regret in choosing to kill her even though she truly felt that that was the only way out. i feel it's easy to say, on the outside looking in, that it's ridiculous for her to feel apologetic, but all in all, it's someone's life that she took with her own hands, and by 2028, she will have wasted 10 years of her life in prison for it. perhaps in retrospect for her, this seems like a needless price to pay for freedom that maybe could have been gained another way.
if you were to ask me, though, i'd say this kind of outcome is nigh inevitable for this level and length of torture and abuse. she should be commended for her resilience in enduring it for nearly 30 years of her life with no reprieve. if i had it my way, she wouldn't have served any time at all

Maybe I’m super cold because I can’t understand why she wants to apologize to her mom’s grave. I understand that murder is never a good solution and she will have to carry that weight for the rest of her life, but I just can’t understand why she feels sorry. I truly do not believe anything could have changed her mom. Murder wasn’t the solution ofc but why should the daughter apologize? I almost see it as self defense…..
But I also recognize that I am also someone who lives in a black and white world, though I do work hard to see the gray - largely thanks to my own mom’s efforts. Idk this manga definitely made me think and I wanted to share my thougts