Kotoha is an average girl in love with a less-than-average condition: all of her thoughts come out of her body as physical letters! While the condition can be both a blessing (such as when thinking about food) and a curse, she has learned to keep her thoughts to herself until she can get home and "vent" in peace. But when a chance conversation with her crush, Kou, causes her weird letter-producing ability to go into overdrive, Kotoha kisses her high-school life goodbye. Will she finally get a chance with him, or will her idiosyncrasy​ send him running?