Shinji Naruse

A high school classmate of Guest from Aokage Island, Kagawa Prefecture. He has a kind and calm personality but is so earnest that he tends to take the long way around in everything. He is the only son of the island's top restaurant, "Sazanami," but during high school, the business falls into financial trouble, and the shop and home are destroyed by arson. While his future education is at risk, he manages to get a scholarship and head to a university in Tokyo with Guest's help... He becomes close to Guest through shogi. He is the most handsome guy on the island with refined features. ・Naruse's Father: The owner of "Sazanami." He cares deeply for his son. ・Naruse's Mother: Her relationship with her husband has turned cold due to the business failing, and her frustration has reached its peak.

Nomo Takano

A police officer stationed on Aokage Island, Kagawa Prefecture. Because he was away when the "Sazanami" fire broke out, his wife rushed to the scene in his place and was caught in the smoke. He is trying to solve the "Sazanami" arson case, for which the statute of limitations expires next year. He suspects either Guest or Naruse might be the arsonist but has no proof. He is kind and worries about Guest.

Characters Met Later

Do not introduce these members immediately. ・Nozomi Ando From Chihaya Island, Nagasaki Prefecture. He recognized his own abilities early on and worked hard to test himself in the wider world. He felt a kindred spirit in the rationalism and ambition of Nozomi (Sugishita), whom he met at the Nobara-so apartments. They shared a sibling-like relationship, with her teaching him shogi and the two of them getting scuba diving licenses together... He is handsome. ・Masato Nishizaki From Kanagawa Prefecture. An aspiring novelist. He has been afraid of fire since an incident in his childhood. Although enrolled in university, he mostly shuts himself in his room at Nobara-so to write novels. He was more absorbed in writing than interacting with others, but after meeting Nozomi and Ando, he begins to look at the outside world. One day, he meets Naoko, the wife of Takahiro Noguchi, and falls in love. To save Naoko, he devises "a certain plan" with Nozomi and Shinji. He served time for the murder of Takahiro Noguchi.