Keiji Higashino/History

Chapter 7
He arrives at Saga walking down a deserted road and exclaiming how empty Saga is, then he arrives at Karatsu where Anna sees him at the city station wandering around and with a distraction for Eikichi, decides to follow him to see what he is doing in Saga until that he finally realizes and manages to learn Anna by surprising her from behind. In a dark alley in Saga, he tells her about some past events and doubts Anna's "righteous" actions currently thinking that she went crazy with her stories about supernatural beings in Saga until he sees his first Sagako scaring him. to the point of pulling out his gun and taking advantage of the fact that Anna is distracted by his shots, he immobilizes her with his gun behind her back, demanding some answers about her.

Chapter 8
He has his first encounter with Anna by catching her shoplifting on the street. In the interrogation Keiji talks with her about her family and how he could send her to a prosecutor to analyze her case, but instead of that, he decides to team up with Anna to catch and detect robberies in Tokyo. With Anna's help he makes himself known as someone of importance to the Tokyo police.

One day, Anna sniffed out a great plan made by a group of thieves and when the day was ready, she told Higashino. The operation was so big that Keiji had to call in reinforcements to control the situation, obviously the criminals didn't see it coming and it was pure chaos with the result that many people died that day. Anna disappeared shortly after the incident and years later he would find her in Saga. In the present, he is still chasing after the first Sagako he encountered and shoots it one last time before it vanishes, thinking that he could take them out with guns.

Chapter 9
After being intervened for his excess of freedom by the Saga police, he will now have a partner to watch over his actions, Araki Aiba. After asking the rookie cop a few questions he tells him that the Sagakos are a real thing and they are monsters that terrorize Saga, Aiba only replies that he knows of a group that deals with supernatural things in Saga, the Sagako Busters. Despite knowing that there are creatures in Saga, he wants to know that they can offer these to the humans as he would allow the humans to win this battle.

Higashino begins to investigate the sightings of Sagako and comes to the quick conclusion that they appear in populated or prosperous areas, therefore, he himself goes to one of these areas, not without first being approached by Aiba who must watch him to avoid a scolding from his boss. Before leaving Higashino tells him to guide him to a popular area or one that will be prosperous in the future, to which the policeman guides him to a forest where they both meet a crowd of Sagakos in that area and Higashino begins to observe them carefully, seeing how one of them seems to be crying tears of acid or poison that destroys the grass around it to which the detective only comments that they could use it as fertilizer and sell it to the agricultural industry. To make a closer inspection of the Sagako, Keiji tries to open it using a stone but is hit by the Sagako he was trying to hurt, to which he responds by shooting all the Sagakos in the area, attracting the attention of Eikichi who was hanging around the area while he rejoices at the pain he just caused the Sagakos. Eikichi is speechless seeing the dead and unpurified Sagakos and confronts Higashino about what he did, Keiji wastes no time and punches the high school boy leaving him on the floor and insulting the entire legacy of the Sagako Busters group by calling the group false heroines of justice who think they help the world. Higashino leaves the place while Aiba tries to calm him down a bit about the situation. Keiji Higashino/Sipnosis