I really liked this story. The characters aren't too simple, and the story is dramatic and complicated. The ending is a bit more open than I would have liked, and I do think he talking to one of the three girls for his ending would have been nicer than him saying, "Fuck all of that." Emi would be my choice, as Yumeno's family would kill him at this point.
Sakura is at this point my favorite yandere, as she is more than JUST that crazy obsessed lover. She is complicated and simple in the same breath. In short, she wants the guy she loves to be happy, no matter the cost. Even at the end, she wasn't a flat character.