Akane Sawai stopped going to school due to emotional problems. Now, she locks herself up to her room and only opens up to her textmate, Yoshiki Fukasawa, who constantly visits her to check on her and convinces her to go to school. Sawai gets irritated by this, and is convinced by her textmate to send Fukasawa to hell. She finds out that her textmate is really Fukusawa and after coming to an understanding, Fukusawa convinces Sawai to send him to hell.

Sai Kirino seeks revenge for the death of the father due to a secret that exists between him and her primary suspect, Mayor Ryouzo Kusunoki. Hajime Shibata succeeded in making him apologize, but it was too late.

Kanako Sakuragi, a kind and sweet nurse was sent to hell by an unknown drug-addict. Hajime Shibata suspected the husband of a former patient but loses trail when the person he suspected is computer-illiterate.

Hosono Souta is a boy who always sits in the infirmary. Because of this, his classmates make fun of him. He falls in love with a classmate, Nitta Kiwako, because she was the only one who did not make fun of him. He dislikes her current boyfriend. Hosono attempts to access the Hotline to Hell, but Ai rejects him. While Hosono is stalking Kiwako at a bowling alley, he overhears her boyfriend suggesting to his friend, Sawazaki, that he will "lend" Kiwako to him so that Sawazaki can finally lose his virginity. Ai appears to Hosono that night, but while he begs her to save Kiwako, he refuses to sell his soul in exchange for revenge. Kiwako later tells Hosono that she accessed the Hotline to Hell and has sent her horrible boyfriend to Hell. Hosono is shocked that she would agree to go to Hell for that and turns down Ai's help once and for all. At the end of the episode it is shown that Hosono purchases a blade, and plans to kill Sawazaki.

Amagi Shizuko adopts a stray cat and names it Muru. She just moved in and has not introduced herself to her neighbors yet. Whenever she tries to no one is at home. Ren often comes to visit her. A few days after adopting the cat, she begins to receive mysterious prank calls. Items that she did not order were delivered to her house. She also receives threatening letters, warning her to throw out the cat. Amagi does not know what to do as she does not have enough money to move out yet. She hires a private investigation agency and they discovers that it is her neighbor named Tachibana Kyouko making prank calls and sending threats. She sends a letter to Tachibana apologising about the cat and told her that she will move out with the cat as soon as possible. That being done, she hears bangs and crashes from next door. The next day, she gets home and discovers that her apartment door is wide open and Muru is gone. She frantically attempts to search for the cat and found a plastic bag filled with meat outside. Thinking that it is Muru, she pulls the string on Ai's doll to send Tachibana to hell. Later in the episode, it is revealed that the cat belonged to Tachibana and she was upset that Amagi adopted the cat. Amagi hears distant cat meows and discovers Muru thus the bag of meat was nothing but another prank.

A girl comes home from work one day to find her mother, who went away when she was still young, has returned. Not only that, but her father wants her to have to pamper her mother every day, causing problems for the girl. She uses the Hell Hotline to get try to get rid of her mother, and tries to do so eventually, but finds that she cannot, because her father used the Hell Hotline and therefore got the straw doll she had. She rushes over to where her father is taking her mother for a walk, but finds her father has already sent her mother to Hell. He father tells her the truth: she is not the daughter of the woman she thought was her mother. After discovering his wife was infertile, her father had a her with another woman. This caused his wife to get angry, and eventually she got involved in a car accident to try and kill herself. The girl then remembers that her mother did accept her once, but knows it is too late.

Yuzuki accidentally bumps into first-year student, Katase Ririka, causing her to break a beaker. The two of them report the damage to teacher Mio Niiyama, who lets the two off without punishment. The next day, Ririka's grandmother shows up at school and accuses Mio of picking on Ririka and continues to verbally attack her over the phone that night. The situation intensifies as Ririka's grandmother hands out leaflets that defame Mio and says she will keep Ririka home until Mio resigns. Mio tries to get Ririka to clear her name, but Ririka deliberately slanders Mio to her grandmother, meaning Ririka was the cause of her grandmother's drastic actions. Saddened, Mio sends Ririka to Hell.

Kamisaka Rokurou is a novelist whose mystery book has received publicity because of real copycat murders resembling its plot, committed by a student. Kamisaka is interviewed by a reporter, Asaba Sumi, but the editor-in-chief changes her manuscript to lies so the magazine will sell more. Asaba apologizes to Kamisaka. The first victim's older sister, Michio Yui, Kamisaka and Asaba meet and decide to each send one person to Hell so they can get rid of three people at once. Michio chooses the murderer Chouchi, Asaba chooses her editor, and Kamisaka chooses his friend. Afterward, Kamisaka is unexpectedly sent to Hell by the murderer's mother, who blames him for her son's crimes.

Yuzuki senses a man about to pull the string on one of Ai's straw dolls. As she rushes to stop him, Ai tells her that her attempts are futile. She shows Yuzuki the man's future. Instead of socializing with coworkers after work, Naowa has always instead played with a young girl named Kaya because he likes children. He has sent his fellow worker, Nakajima, to hell because of Nakajima's disturbing behavior and inappropriate interest toward Kaya. Nakajima's girlfriend, Yuki, joins their company to investigate. She forms a romantic relationship with Naowa, keeping silent about who she is. One night, Naowa finally reveals he is unworthy of her because he sent Nakajima to Hell. Yuki then reveals her true identity and sends Naowa to hell. Despite seeing this future, Yuzuki still has hope.

Yuzuki realizes that suddenly, nobody in her school or town knows who she is. Only Tsugumi still recognizes her. Tsugumi reveals that she was never fated to become Hell Girl like Yuzuki had thought. She has given up hope of stopping the cycle of hatred like her father, Hajime. She tells Yuzuki she must accept that this system exists, and concludes that Yuzuki is not a person of this world after realizing that up until now, her life had been an illusion. Yuzuki refuses to believe this and flees. She finds her apartment in a decayed state, with a corpse of a girl on the floor. Ai Enma and her companions appear, revealing that she had actually died a long time ago.

The Nagatas are a dysfunctional family of disturbed individuals. Both parents are neglectful and selfish, while the oldest daughter Asuka is a bully. Only the two younger children, a boy Akira and a girl Arina, are decent.

Akane Sawai, a depressed high school girl, stays at home and only interacts with her friend whom she met online. Her concerned teacher, Yoshiki Fukasawa, constantly visits her to try to convince her to return to school. Akane gets irritated by this and decides to send him to Hell.