On a quiet night, a man sneaks into the house to try to peek at the girl, but is chased away by the girl's mother who rushes in with a weapon. Accidents are investigated by inland sea and bow crews.
During the investigation, Kaoru Uchiha found that the infiltrator man was actually her childhood classmate, and the two had not been reunited for a long time before the accident, because of this relationship, Bow Cut suggested that Inkai avoid suspicion, and this was Kaoru receiving a call from his classmate Sakaki, who said that he had divined his guardian angel to let him come to this room tonight, and then he went, and Kaoru listened to it and let Sakamoto quickly surrender himself.
Yukawa sensei is very interested in carving wood carvings, and after explaining the case in the Inkami, Yukawa shows great interest in Sakagi's ability to foresee.
Yukawa and Inlandi first investigated Sakaki's divination shop, and after sampling the divination water inside, they found no other abnormalities. When visiting Sakaki's home, his family said that Sakamoto was an ordinary person with no special abilities, but Inland Sea recalled the painting songs he sang when he was learning to paint with Sakaki when he was a child, and when he visited the painting teacher's home, he found that his home was dilapidated and uninhabited.
In the research room, Inland Sea received a call from Sakaki, and after some communication, Sakagi informed Inland Sea of his current hiding place, but told Inland Sea that he could only go alone, and the righteous Inland Sea decided to go to the appointment, but Yukawa said that since he already knew the prisoner's hiding place, he should notify the police station instead of acting privately, Andai retorted that as a friend, he should help him as much as possible and persuade him to turn himself in, and Yukawa was intimidated and had nothing to say.
The Inland Sea side went to the appointment, but did not see Sakaki. Yukawa somehow went to the painting teacher's house once, and after some search, he found a photo (this photo looks a bit familiar). Yukawa, who already had a guess in his mind, found inland sea to test the conjecture, but he did not know that the trailing Sakaki had pulled off the ladder, and the two were trapped in the cabin. Although trapped, Yukawa later figured out a way to contact the outside world with his mobile phone.
Early in the morning, the rescued Uchiha receives a phone call saying that Sakaki has been arrested and is preparing to send Yukawa back to school, and Yukawa offers to go to the informant to verify the conjecture. When Yukawa saw the exterior of the house after getting out of the car, he immediately thought of a lot of things, and after some calculation at the window glass, he told Inkai that he did not need to meet with the reporter at this time, and he would go back to the research room to tell Inland Sea all the facts.
In the research room, Yukawa took out the drawing teacher's atlas and told Inlandi that in fact, she, the painting teacher and the Morizaki family had a very important relationship, the painting teacher and Mrs. Morizaki had a bad relationship, the painting teacher regarded Kaoru as a stand-in for his daughter, and the guardian angel that Sakaki thought was actually Inland Sea. With the loss of her painting teacher, Mrs. Morizaki thought that no one would find out about her extramarital affair, but with the appearance of Sakaki, this situation was broken, and in order to avoid others from discovering, Mrs. Morizaki used a trick to let Sakaki sneak to the house, ready to solve Sakaki in self-defense counterattack, all to bury the unknown past.
Inside the canteen, Inoue thanked Yukawa for giving him an investigation assistance that had nothing to do with physics, and in order to thank him, Inland Sea was ready to give him a friendship, Yukawa thought about it and said that the minimum requirements for the contact object of the science department naoto, Inland Sea listened... Straight man