Nagatoro's motivations in "Don't Toy With Me, Miss Nagatoro 4" are complex and multifaceted. While her actions might initially seem like mere teasing and torture, there's more to her behavior than meets the eye. 

One key aspect of Nagatoro's teasing is her desire for Senpai to assert himself and stand up for his own preferences and desires. By pushing his boundaries and encouraging him to respond assertively, Nagatoro is, in a way, challenging Senpai to become more self-assured. This desire for personal growth and the development of Senpai's confidence adds a layer of depth to Nagatoro's actions.

While Nagatoro's teasing might seem intense, it becomes increasingly evident that her motivations are not solely to create misery for Senpai. As the story progresses, hints emerge that suggest Nagatoro might have a hidden, more affectionate side. Beneath the teasing and playful banter, there are moments that imply Nagatoro's actions might be driven by a genuine fondness for Senpai.

On Senpai's part, while he initially tolerates Nagatoro's teasing, it becomes apparent that he doesn't entirely dislike the attention.