love? This is indeed a symbol of irrationality, can love be explained by equations? For example, ax2+bx+c=love, or is love like a circle with a radius x radius x love?

On a cold morning, the stone god buried his chin in his scarf and walked toward the new bridge, the wind lifting his coat. Under the bridge there was a row of homeless dwellings whose lives were as precise as a clock, and one of the men sat on a wooden chair and looked into the distance. After passing through the homes of these homeless people, Ishijin walked into a bento shop next to the road as usual, and the manager, Yasuko Hanaoka, handed Ishigami the signature bento he often bought, which was The only pleasure of Ishijin, just to see Yasuko, a neighbor who was working in the bento shop.
The doorbell rings, Yasuko, who is cooking, opens the door, a middle-aged man breaks in, this man is called Shinji Fuki, is Yasuko's ex-husband, because of the luck to lose the money and came to his ex-wife to ask for money, the two quarreled, wearing a school uniform Miri pushed the door in, because they could not stand Shinji's rogue behavior, the mother and daughter duo accidentally killed Shinji in a quarrel with Shinji. The stone god who lived next door to Yasuko's house peeked through the crack in the door, and then said something through the door, and the person on the other end opened the door completely.
A few days later, Kaoru Inkai and Shunpei Kusanagi came to Yasuko Hanaoka's home to investigate, because the police found a naked male corpse on the bank of the river, the face was damaged, fingerprints were burned, after comparison, this person was Yasuko's ex-husband Shinji Tomiki, who recently came to the city, the investigation found that Shinji Fumiki died between 6 and 10 p.m. on December 2, Uchiha Kaoru asked Yasuko where to go on December 2, Yasuko said that she went to the movie theater with her daughter that day, and provided movie ticket stubs. Yasuko's alibi left the two police officers unable to refute it, and the two left Yasuko's house and met Shi Shen on the stairs.
The clueless investigation duo came to Dido University to seek Yukawa's help, and yukawa expressed surprise after mentioning ishin during the chat, and at the same time praised Tetsuya is a rare genius.
In the evening, Ishigami, who was returning home from work, recognized Yukawa, who was waiting at his doorstep. At the dinner table, Yukawa said that Officer Kusanagi had inadvertently mentioned Shi Shen, and the case connected the two of them, Yukawa took out the trial calculation of Riemann's hypothesis, and asked Shi Shen to try to judge whether the disproof was correct, and Shi Shen was immersed in the world of mathematics, and by the time he came back to God it was already the next morning.
The two men went out together and crossed under the new bridge where the nomads lived, and the man who had sat in the chair earlier did not appear today.
In front of the mirror of the building, Shi Shen looked at himself and Yukawa and said, "I really envy you, you always look so young." ”
Yukawa's eyes flashed with complicated thoughts after listening. Inside the bento shop where Yasuko works, Yukawa notices that is not like a normal neighbor between Ishizu and Yasuko. When the two were separated at the intersection, Yukawa said to Ishijin across the heavy vehicle: "Come up with a difficult question or solve that problem, which one is more difficult, the answer is absolutely there. Well, don't you think it's interesting? ”
Ishigami stared at Yukawa and said, "It's funny, I'll think about it." The stone god quickly turned around and stepped towards the road.
Yasuko's boyfriend Kudo sends her home, and Yasuko looks happy, but reveals some uneasiness. Yasuko looked back and saw the stone god looking at her like a Buddha statue, and when she turned back, the stone god was gone.
The phone rang, and Shi Shen told Yasuko that he had placed two letters in Yasuko's mailbox, explaining the role of the letters, and saying that this was their last call, and then hung up the phone.
Ishijin comes to the police station and turns himself in, admits to killing Shinji Fuki, and confesses the crime, the police ask Ishijin why he turned himself in, ishijin replies that it is because Yasuko betrayed him.
The police came to Yasuko's house, And Yasuko took out a white envelope containing a secret photo of Kudo and Yasuko on a date, while the police found the corresponding eavesdropping equipment and evidence of murder in the stone god's room, and the prisoner Stone Hammer was undoubtedly a stone god.
Yukawa finds Yasuko Hanaoka, and in the face of the person who is gambling all his life on isting his life to protect, Yukawa thinks that she should know everything, so Yukawa restores the truth in front of Yasuko. After listening, Yasuko sat in a chair and could not move.
Inside the detention center, Yukawa couldn't understand why the stone god had made such a great sacrifice for Yasuko Hanaoka.
The stone god walked slowly in the corridor, recalling that day, when he was desperate for life and was preparing to end his life, the doorbell rang
The newly moved Yasuko Hanaoka's mother and daughter warmly greeted the new neighbors and sent gifts, the sun hit his face, and the mother and daughter let the stone god see the hope of life. Ishigami concludes brown's letter by writing, "Mr. Kunimiku Kudo is an honest and reliable man. Marry him, hope you and Miri can be happy, forget me completely, and don't feel any guilt. If you are not happy, all I have done is in vain. At the end of the film, Yasuko Hanaoka appears in the corridor and looks at the stone god, and the two sides emit a cry of soul.
Keigo Higashino said that this was the purest love I could think of, the best trick. Unlike most mystery novels, Keigo Higashino announces the murderer at the beginning of the story, but the author hides the process and motive of the crime deeply.
The theme of this film is undoubtedly to promote the greatness of love. As the book says, "The end of logic is not the ideal state of reason and order, but the love that I dedicate my life to."