While facing the investigation of the suspect, Prosecutor Nishimura Kanade of the Yokohama District Prosecutor's Office's Central Branch recalled the scene in the third grade of junior high school when his father Eisuke Tsuji, who was a prosecutor of the Tokyo District Prosecutor's Office's Special Investigation Department, passed away.Eisuke, who pursued justice as a prosecutor, was involved in a corruption case, leaving doubts and dying. Kanade changed his surname and moved to Nagano, his mother's hometown, and lived life with bated breath.Wanting to become a prosecutor like his father, Kanade's fate changed a lot when he studied hard in isolation. This was the summer of his second year at Shinano University School of Law.

Nogi Maki (Kamenashi Kazuya), who was sitting next to Kanade who was about to take the final exam, suddenly made a cordial contact despite the surprise of Kanade.After that, Maki also contacted Kanade and introduced his friends Tomomi Mori (played by Emma Miyazawa), Yuki Umeda (played by Yuma Yamoto), and Oikawa Takuri (played by Minami Tanaka).Thanks to Maki like this, Kanade has a partner for the first time in a closed spiritual life.“Let's be friends forever” - As this sentence says, sing the praises of youth with friends on a campus full of nature.For the first time, I laughed from the bottom of my heart and lived a fulfilling life.

Furthermore, the relationship between Kanawa, who had been living alone until now, and his father Nogi Koichiro was bad, and Maki, who had never liked anyone sincerely, was gradually attracted to each other, and a secret love affair with his friend began.While noticing Kaori being attracted to Maki, Kanade deliberately diverted his attention and indulged in his first love...

One day, something unexpected happened to Kanade and them.With this incident as the boundary, their youthful era, which was supposed to be an eternal friendship, suddenly came to an end...

But, 12 years later——.Kanade is faced with an incident from his college days again in an unexpected way - and that is connected to the mystery of his father's death 20 years ago...!?