Aoi Tsujimura does not view herself as a main character in any way. Timid and insecure, she is perpetually alone, in contrast to her athletic older brother, Itsuki, and her mother, a renowned shoujo mangaka. However, Aoi does not need to be the heroine; her only desire is to have a true friend. Itsuki, on the other hand, disagrees. When he brings home Aoi's effortlessly cool classmate, Sena Mizusawa, the two devise a plan to teach Aoi about love, using shoujo manga as their guide. Can this dull side character become an unparalleled female lead by falling for the perfect guy?