Although Yuzuki senses that a girl named Usagi has contacted the Ai, upon confronting her, Usagi claims to know nothing. Shinohara Usagi, nicknamed 'turtle', is a schoolgirl who is always being helped by her friends because she is so slow at making any kind of decision.
One day, a boy named Endo asks her to date him inspiring glowers of jealously from her friends. However in jealousy, before anything can develop, Endo is forced to cheat on her by her brother Michito, and he break up with her, believing he has lost the right to be with her. When Usagi questions Michito, she reveals she has accessed the Hell Correspondence website by pulling out a straw doll (Yamawaro) intending to send her brother to hell. Shocked, he too reveals that he done the same by revealing a similar straw doll (Hone Onna). The two have a heartfelt talk about their individual sufferings and subsequent hatred of one another. Michito is jealous of Usagi, because their parents have gave her far more attention due to her problems, while as Usagi is jealous of Michito, who seems to be the capable big brother their parents are proud of. They walk to the nearby bridge and drop each of their dolls into the water, both vowing to try their best in the future. Michito tells Usagi that there would be a lot more good men to choose her love from.
However when Michito leaves, Usagi secretly retrieves the doll from the river and pulls the string and sends her brother to hell. On his way to hell, both Usagi and Michito get a peek at the continuation of Usagi's memory from earlier, where he came back guiltily to her little sister and said that he would marry her if she grew up to be beautiful after seeing her cry when he rebuffed her. And the episode ends with Usagi saying that she can do her best despite being a 'tortoise' and laughing like mad or probably crying.
So it is implied that Usagi loved her brother so much that she wanted to marry him, but Michito just neglected the affection, even after the talk he just turned the hatred into affection between family members, and that's why Usagi went insane, and sent him to hell.
This episode contains examples of:
- The Bully: Usagi's friends talk down to her despite knowing her since preschool, and after she gets a boyfriend they begin to jealously gossip about her behind her back.
- Brother–Sister Incest: One-sidedly on Usagi's part. Michito's inability to reciprocate is implied to be what sends him to Hell.
- Character Tics: Usagi laughs nervously whenever she doesn't know how to react to something that was said.
- Childhood Marriage Promise: Usagi and Michito made one when they were children. Unfortunately for Michito, Usagi was serious about it and his forgetting the continuation of the memory of when the promise was made is what gets him sent to Hell.
- Dragged Off to Hell: Usagi sends Michito to Hell.
- Ironic Name: Usagi means "Rabbit" but her nickname is "tortoise" because of how slow she is at making decisions.
- Father, I Want to Marry My Brother: When they were children, Usagi told Michito that she wanted to marry him when they grew up and he rejected her. However, a continuation of the memory shows him returning and telling her that he would marry her if she grew up to be beautiful.
- Mutual Envy: Usagi resented her Michito for always being seen as reliable while her parents had given up on her, while Michito resented Usagi for always being coddled by their parents while he was forced to do things on his own because they saw him as being reliable.
- Sanity Slippage: Usagi in the ending.
- Stepford Smiler: Usagi smiles and laughs as a way of coping with knowing that her parents have given up on her and her friends hate her.
- Twist Ending: The siblings apparently makeup after years of resenting each other and the ending shapes up to be the first in Hell Girl history where no one goes to Hell ... only for Michito to be sent to Hell by Usagi because she can't take knowing he no longer has any intention of keeping his promise of marrying her.
