This is a spin-off prequel that revolves around the high school life of Kikka and Mashimo before the events of the main series 200 M Saki no Netsu. Release date 23 June 2022.

Because of bullying, 3rd year High School boy Mashimo Chitetsu transfers to a new school. At his new house, he meets his classmate – Kikka Tsumugu. So the school life between the young couple began.