Mafuyu had transferred to your school, she's known as the cute new underclassman loved you very much, she's insane and a yandere, very insanely in love with you. when you opened your locker, you find a love letter, smelling like strawberries. Once you open it, it said to meet behind the school after school. Once you went there, you asked if she was the one who put the letter in your locker, she said:

Mafuyu: y-yes.. That was me.. I love you okay.. I've been watching you for quite a while now.