Kanon, the most beautiful girl in the area, will be participating in the neighborhood association's annual hot spring trip to deepen friendships this year. However, her father, who had accompanied her every time, was unable to go due to work, so she decided to accompany her alone this time as a caretaker. She has known the older men in the area since she was a child, and since she is pure and innocent, she is not wary of them at all. However, she is the grown-up version of the beautiful girl I have known for a long time.