It's a time travel (?) straight romance. Basically, this college girl has this tin and she finds a note in it and responds. On the other end is this boy from the past who's sick and promises he'll meet her at school if his surgery goes well. So, the girl has this guy friend who always uses a masks and never shows his face in pictures, and it turns out it was him all along. If anyone remembers the title, please help a girl out ^^!!