An ordinary middle school girl goes to her grandmother's house for the summer vacation. One day, while running around on a mountain with her grandmother, she falls into a cave and finds a green ring. The ring once belonged to an ancient goddess. After the girl puts it on, it gradually clears impurities from her body without her realizing it, leaving her skin soft, fresh, and fragrant. It also stimulates her brain cells and strengthens her memory. When she wakes up, she finds herself lying in the bed at her grandmother's house. She props herself up with one hand and sits up. At that moment, she realizes that something seems to have pressed into her hand. She raises it and takes a look, startled to see the same green ring from the cave on her finger. Even stranger, the injury to her foot from when she fell into the cave has healed...
This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.