>>280929044
Marina deserved to be disciplined and punished, sure, but not killed. She is a 10-year old kid that didn't know any better. Her home life being shitty wasn't meant to justify her actions but rather show that this was just how she was grown and what she was used to, something the anime literally spells out in the latest episode for naive and retarded viewers. Without a better influence, Shizuka also ends up following in her mom's shitty footsteps by seducing and manipulating Azuma in both timelines.