The third and fourth parts of The Ring, Immortality and True Identity: What are they about?

"Midnight Ring" Four teenagers died mysteriously at the same time and in different places. The faces of the deceased showed a look of horror. What caused this death? Driven by curiosity, reporter Asakawa began an investigation. A mysterious videotape, a curse of death, and an unknown history. The truth is getting closer, but death is approaching step by step. After the ringing, terror spreads in the city, and the invisible and ungraspable dark factors are pervasive!

"Midnight Bell 2: Road to Resurrection" The virus has begun to spread. Sadako is reborn through her belly. It turns out that there is only a thin line between life and death. Ando betrayed humanity for his son and signed an evil contract with the devil. Ryuuji was resurrected because of Sadako, but what will happen after Sadako is resurrected? What fate and ending will mankind face? While the expression of terror and consternation still remains on your face, another shadow is quietly looming over you.

"Midnight Ring 3: Immortality" The metastatic cancer virus is raging, and mankind is about to suffer catastrophe. In order to save her loved ones and save humanity, young Axin embarked on a road of no return in pursuit of the truth. When he discovers that he is just a clone of Ryuji Takayama, when he discovers that everything is originally controlled in the "ring world" created by the union of humans and computers, and when he discovers that only by sacrificing himself can he save mankind, what will he do? choose?

"Midnight Bell 4: True Love Revealed" The reunion did not bring any sweetness to the former lovers Sadako and Toyama, and all the answers were buried in Sadako's life experience. Although death is approaching step by step, Toyama still does not change his attachment to Sadako. The Sadako storm that set off the most terrifying and trembling world finally subsided, and both worlds returned to the starting point of peace and happiness. But is this really the end? Will the "circle" created by computers create another "circle"?