Hazime Kisaragi and Satomi Akahata are in charge of management operation for the city's mascot character "Yassadaru Man." Yuna Isoya is a big fan of "Yassadaru Man." One day, she is assigned to the section where Hazime Kisaragi and Satomi Akahata work. Hazime Kisaragi falls in love with Yuna Isoya at first sight. Hazime Kisaragi also gets enthusiastic with work involving "Yassadaru Man." The big project for "Yassadaru Man" begins.