Every year, Kanon Kanade, the town's most beautiful girl, participates in the annual neighborhood association's hot spring trip to strengthen bonds among residents. This year, she was once again invited but her usual companion, her father, couldn't attend due to work. So, she decided to go alone and take care of everything as the designated chaperone. Being familiar faces since their childhood, the local uncles didn't have any suspicions about Kanon's innocence. However, as they witnessed the grown-up version of the girl they knew back then, their perverted desires were ignited by her purity. They started taking advantage of Kanon's naivety, escalating their sexual harassment...
