Shi Yuanjing, who has no father or mother, broke up with her boyfriend Ito Yunen when she was fourteen years old. In great pain, she decided to go to her boyfriend's hometown - Japan to see the cherry blossoms. There was a car accident in Japan, and she lost her memory when she woke up. The kind-hearted Japanese student Natsui Hideto helped her find her family and let her stay at home. Because of the scent of mugwort on her body and the cherry blossoms beside her when she had a car accident, she was temporarily called Ai Ying. But her family could not be found, so Xi Yuanjing stayed there for three years using Ai Ying's name. One day three years later, Ito transferred to her school and the two met. What would happen? ? ?