"Goodbye! Yushan."
This was the last separate meeting between Sanan and Hayama. Sanan left in tears knowing that she would never be able to stand Hayama being with her friend Fenghua, so she finally decided to go to the United States with Naosumi.
However, Shanan in the United States disappeared and became one of the missing persons.
At the same time, in a small village near Tokyo, Japan, an old man named Sakura adopted a girl who had lost her memory. He named the girl Sakura Mikan. Even though Mikan lost her memory, she was still cheerful and lively. She even made a friend, Hotaru Imai, who transferred to Alice Academy in Tokyo. Mikan, who was worried about her friend, also came to Alice Academy and found that she felt different.
Here Mikan meets Hinata Zao, a boy who is both strange and familiar to Mikan. However, the mystery of Mikan's life experience is also gradually revealed.
Shanan's mother was invited to attend the Alice School Festival because of her special status, but she discovered the missing Shanan here.
How will Mikan, who has lost his memory, face his life experience and his adoptive mother? How to choose between past love and current love? At the same time, how do you deal with your past friends and your current best friends?
Various choices are placed in front of Mikan (Shanan), how should she choose?