Nice.
This is why I like Nagatoro, she doesn't ever actually try to give long-term damage to senpai. In other teasing manga, with an example of Takagi-san, there are multiple times where she screws with Nishikata in ways that are a lot harder to fix, off the top of my head those being: making him pay for her drink a LOT of times (kids aren't made of money), and that one chapter where she misleads him to study the wrong thing, and he fails the test. Nagatoro never actually puts anything long-term on senpai, and instead just makes him super embarrassed, or hurts him a bit.