I want her to choke me to death
Maybe you're fine, and I won't kink shame you, but uh...

...
I'm not a fan of actual yandere, but I don't mind reading them; that said... im not convinced she is one (yet). Honestly, this girl has a good head on her shoulders! She may be a yandere, but so far this is just what it actually takes to get a person like this (male, female, or otherwise) to go away.
This is actually the correct way to deal with a narcissist, which is plainly what this... this "Drop" girl is; Drop is obviously a narcissist, and is almost following a script to let us know she is one.
And this is Exactly how you deal with a narcissist: make them understand, in a way that cannot be mistaken, that they will either leave your presence, or leave the realm of the living.
Anything less, and they think there is still a chance for them to take over your life. (For your own good, of course; they're helping you by the enslavement, after all!)
Either end their life (a good choice for a narcissist!), or let them know that the option is both available and preferred; that's it, for getting rid of a narcissist.
And our girl did it perfectly!
Since it's Japan, we have to pretend that there is something wrong with her (yandere), instead of just admitting that her actions are both highly moral, and in the absolute best interest of society.