Sana is mentally sick when it comes to loving Dahyun.She thinks that Dahyun is too sweet and innocent to be left alone unprotected.

    What did she do to protect her Love? Kill and torture anyone who thinks of Dahyun in a bad way or harms her,and this caused  misfortune to the school Dahyun is attending.

         Since she's the main target for bullies there,Sana's schedule and to-kill lists are full.

   "I may be cute and innocent.But touch the one I love and I'll cut you up"

    ~Minatozaki Sana