Nazo no Kanojo X

A new student named Mikoto Urabe joins Akira Tsubaki's class, displaying odd behavior such as sleeping at her desk, carrying scissors, and laughing unpredictably. Despite her reclusive nature, Tsubaki feels drawn to her in a way he cannot explain. After an accidental moment involving saliva exchange, he becomes inexplicably addicted to her. Urabe, however, appears unfazed by the situation and has already begun making plans for their unexpected connection.