During her student days, Kyoko Ohashi made a name for herself nationwide in swimming competitions. She returned to her alma mater, Aotaka Academy, as the advisor for the swimming club. The once prestigious swimming club was now facing an existential crisis, and Kyoko was invited to turn things around. However, students Hisamichi and Hashimoto plotted rebellion against Kyoko's passionate coaching. They lured Kyoko into the gym storage room, knocked her out, and then assaulted her body.
