Mind-controlled

At the end of the common line, Sakuma's identity was exposed. He was a low ranking member of the Committee of 300 who assisted in the research of "gigalomaniacs". Sakuma was able to artificially use a "mind-controlled" ability through a huge instrument (weapon).

At the beginning of the game, he conspired with the serial murderer using his mind-control ability to help her, enact the "Return of the New Generation Madness". This lead Takuru Miyashiro to pursue the mysteries of the incidents, which was what the serial murderer planned and hoped for. Sakuma also secretly monitored Takuru Miyashiro's actions.

Shinji Itou was manipulated by Sakuma's mind-control, and was asked to kill yui to avenge Takuru miyashiro. The motive was that Takuru was extremely angry at Senri Minamisawa's resignation to Senri Minamisawa. Under the guidance of a long time, he believed that he once loved Senri Minamisawa deeply and vowed to avenge her. It was foreshadowed in the chat history shown during the first few chapter, that Shinji was going to get Takuru killed. The abnormal condition of hypertrophy also occurs in the brain at the same time.

After the previous incident, Shinji removed some of the sticky notes that takuru had posted, and hinted that his incident was over, which made takuru let his guard down and triggered the Minor Indiscretion incident on October 28. Shinji Itou abducts Yui to leave the Aoba dormitory, uses the knife from the convenience store to make Yui into a gift box, and puts Yui in the shape of a human body. Takuru came running later and confronted Shinji leading them both into a fight. Nono joined the scene shortly after. In the process, Laisu insisted that Nanze did not hate takuru because of Laisu's reminder. Senri Minamisawa didn't know Shinji at all, which also laid the groundwork for Nono Kurusu's discovery The contradiction of his own motives, because Shinji has never met Senri Minamisawa, let alone love and revenge. After he discovered the fact that he killed Yui just now, the huge impact of reality crushed Shinji, and he had a mental breakdown due to the effect of Mind-controlled and lost consciousness.

Woke up during the treatment, asked for forgiveness and provided takuru with key clues, telling takuru that he had been unsuspectingly guided by thoughts in the activity room of the news department, which reminded takuru to lock the suspects in the series of events among his own people. Shinji also fell into a coma due to severe head pain, and finally recovered during treatment.

It is hinted in the game that the nature of Aoba's dormitory is also to study ability users and chaos children. The main character, Takuru Miyashiro, was taken into the Aoba dormitory because his ability to be close to a real capable person was noticed, and Sakuma thought he was a good candidate for human experimentation.

In order for the committee to re-conduct human experiments, Sakuma ordered Serika Onoe, who had the same interests, to create a series of strange murder cases. The strange death methods of the deceased were all Sakuma thought of. The purpose of Sakuma's killing is just to make himself feel interesting, even brutally killing his adopted daughter. In Takuru's words, he is a typical entertainment criminal.

After his identity was revealed, Sakuma led Takuru and Serika to Komo's underground theater, where all the experiments started. In an empty theater in the middle of the night, Takuru fought to the death with Sakuma and Serika respectively. As a result, Takuru broke through Sakuma's delusion and used his own power to stab the awakened Di-sword into the brain of his former adoptive father. Serika, who used to exist like a doll due to her own delusions, transformed into an ordinary girl with Di-sword, giving her a new life.