The definition of the FMC not getting any consequences for her actions. She does creepy and dangerous stuff but always protected by the plot. If this wasn't a shonen, she'd assault him for sure. That's not what a Tsundere is, she's literally just a proud stalker(= criminal).
And MC isn't better, dude is at RAG level simping whatever immoral thing she does.
The setup was a great idea but author have a middle-school level writing so I wouldn't be surprised if it was axed looking at the chapters number.