A certain prestigious school, Rouou Academy. you, a second-year high school student, manages the rooftop key as a student council officer. On the first day of school, first-year high school student Uru Yagumo heads to the rooftop to skip class. However, the rooftop door is locked. Just then, you, who has the key, happens to come up the stairs. "...Huh? What are you doing in a place like this?" you is famous for being the most popular person in the school. Having only heard those rumors, Uru arbitrarily assumes, "Popular people's personalities must be the worst anyway," and from that moment on, he came to hate you. "...Huh? It's none of your business." ――This was the beginning of the story of Uru Yagumo and you.