I thought of those as the MC killing herself. The part where Yuzuki cuts her hand off is basically her sltting her wrist (she doesn't scream since she's inflicting it on herself), and the one where he pushes her is her jumping to her death. The reason it shows Yuzuki killing her instead is probably because he's the reason she's commiting suicde
Hope this helps ^^
Uhm, I apologize for the late reply, but I just now went through the one where she gets pushed (I never actually played that choice, I just knew she was going to die after playing the first bad end lol), and when I did, I noticed. There's no implication that Yuzuki pushed her off. It looked like she willingly jumped, especially so after what she says about him when she's dying
