Kang Yeon-woo, a physical education student with a strong physique has a secret and that is, he likes pretty and cute things. His hobby is decorating diaries! Famous as "Strawberry Fairy" on SNS, he goes to the stationery festival himself after hearing that his favorite artist's new sticker will be released. But due to a turn of events, Kang Yeon-woo's identity as Strawberry Fairy is revealed! How will his favorite artist react now that she knows the face behind the famous cute user Strawberry Fairy?