there was once upon a time in a far far school called instituto juan maria del arco
There was a girl called cel (not cell nor cellphone, dont get it wrong) who was in love with another girl in another grade, called yuki.
Cel, desesperate for yuki, made a love letter that said: "You have a secret admirer -Stranger"
yuki, confused by this looked at her surroundings, clearly not noticing cel stalking her from a window.