I'm conflicted. On one hand I really liked the ending, and I definitely appreciated that Manami ended up in juvenile detention, but on the other hand, there were some things that felt rushed. For example, Sako faced no consequences for r*ping and blackmailing Ayumu. With the way the story went, I definitely thought he was going to get what he deserved. Also, the teacher with the short hair, I forgot her name, how on Earth should she be allowed to teach? She entered a relationship with a teenager! That is illegal and should have been on her permanent record.
Other than that, to those who say this isn't realistic, educate yourselves. I am a victim of bullying, and this is exactly how teachers and superiors react to situations like these. They do anything they can to sweep it under the rug and find a way out. The only unrealistic aspect of this manga was that Manami got caught and sent to juvie after, and this is rare, Ayumu sued her. Usually this doesn't happen.
Great manga overall, super underrated.