Mitsuha is sick of her stupid friends and boring school life. All she wants is to be left in peace. One day by mistake she becomes penpals with Haru, whom she doesn't know at all. Only with him can she be honest. There's one guy in Mitsuha's school who's just the way Mitsuha would like to be - cool, a little scary and above all - alone. One day she meets him in a bus... What will happen next?