Keep your book on the table and stick a note out between the pages, write whatever you wanna ask them on it
help

Bro, if the person didn't write his/her name, then it could be a prank by one of your friends (possibly). I mean what's the point of doing that if the receiver don't get to know who's it from

Maybe they are requesting a heart transplant. Can't trust kids these days ...

Pretty sure the teacher is the one who wrote this. Womp womp
Maybe it was a very poorly drawn heart.