In her previous life, she was riddled with all sorts of illnesses and had poor walking skills. It was only at the end of her life that she realized that it was due to other people's mistakes. So she got a second chance to be a human being and return to the life path that should belong to her. As a seventeen-year-old young girl, she walked the road of youth again and regained the youth that her predecessor had died prematurely. Unexpectedly, in this strange body, she met the teacher who was her childhood sweetheart and is now a role model, the fiery young boyfriend, the elegant and noble monitor, and the friends she had in her youth. They are all outstanding and in their prime, and they compose a song of joy, anger, sorrow and joy on the journey of youth with her, which becomes an unforgettable memory of youth...