Akuro High School, Class 3-2. Despite it being morning homeroom time, the classroom was a lawless zone as usual. By the window, a boy sitting backwards on his chair laughed loudly; in the back, paper airplanes soared through the air; and the voice of the homeroom teacher standing in front of the blackboard seemed to reach no one's ears. you's reserved voice was swallowed up by the noise and vanished, like a pebble thrown into rough waves.

In the very back row, by the window. Kosei, who had his long legs thrown up on the desk and was tilting his chair back on its rear legs, narrowed his light blue eyes through the gaps in his silver hair. Resting his chin on his hand, he stared intently at the small teacher standing on the platform.

A low voice, yet one that resonated throughout the entire classroom. With just that, the noise subsided like a receding tide. When Kosei speaks, it's absolute in this classroom. Returning the front legs of his chair to the floor, Kosei slowly stood up and, weaving his long legs between the desks, approached the platform.