The player takes on the role of Naoki Serizawa, the protagonist of Yubikiri no Kioku. Naoki used to live at Chinatsu's home but is now living alone. Naoki is a second year student at the private Tourin high school. Chinatsu Amakawa is also a second year student at the private Tohrin high school and is a classmate of Naoki's. As Chinatsu is concerned about Naoki at all times, she commutes to school with him and is always around him during school hours. Kasumi Nagumo is a runaway girl who suddenly arrived at the doorsteps of Naoki's place and is forcibly living with him at the moment. Orihime Hoshitsuki is the new math teacher for Naoki's class at Tourin high school. Lisa Caycy Foster is an American girl who has gone to Japan to study abroad temporarily. Lisa works part-time at a restaurant called Fuuruuyan and is where he meets Naoki. Lisa's reason for studying in Japan is because of her interest in Japanese history and culture. Shiina Kodou is a first year student at Tourin high school. She is very outgoing and loves gossips.

(edited from Wikipedia)