After loosing control and forcing himself on the tutor he had a crush on in junior high, eccentric and excessive Aikou decides he needs to learn about love from scratch. So, in high school, he joins a kiss club. While standing in a park with free kisses sign, Aikou is kissed by Eisuke, a student from his school. Afterward, Eisuke begins trying to get more kisses from Aikou.
Free Kisses