Meet Kageno, the super dull, glasses wearing, short first-year high-school girl. She has no friends and envies people who are enjoying their youth. Meet Mitsunaga Youta, the most popular handsome guy in school. Girls constantly confess their love to him, but he has no plans of dating anyone. After a string of events, he decides to ask Kageno to be his fake girlfriend for a month in order to stop the girls from confessing to him in exchange for his friendship. How will Kageno face all the ordeals that are about to come?