In sixth-year Potions at Hogwarts Y/N begins suffering from increasingly severe headaches that disrupt her focus and feel like something is pressing directly into her mind. At first, she blames stress or potion fumes, but the pain becomes too consistent and always intensifies around a specific person. Theodore Nott is the first to notice the pattern. Quiet and highly observant, he watches her closely until he can no longer ignore that something is wrong. When her symptoms align with moments of mental instability, he makes an unusual choice and uses Legilimency on her. What he discovers is not simple illness, but signs of an external presence interfering with her mind, something she has been unknowingly resisting. As he investigates further, he realizes her headaches are linked to a deeper mental intrusion, and that her mind may already be partially compromised or protected against it. Meanwhile, Y/N begins to experience strange gaps in her thoughts and emotions that feel чуж like they are not entirely her own, along with an unsettling awareness of Theodore’s attention. When she briefly senses him inside her mind, the truth becomes unavoidable: someone has already been inside her thoughts. This forces a tense dynamic between them, as Theodore tries to uncover the source of the intrusion and Y/N struggles to understand whether he is a threat to her mind or the only one capable of saving it.