Volume 0

Volume 0 is a special edition of the manga. Its content includes pilot chapters of Jibaku Shounen Hanako-kun when it first serialized in G-Fantasy, along with AidaIro's debut work, Dear My Living Dead.

Chapter 1: Hanako-san of the Toilet
The rumor about "Hanako-san of the Toilet" circulates around the school and Hanako mentions how he wishes that someone would come soon.

Yashiro makes her way into the bathroom following the rumor's instruction of going to the third stall, locking the door, and knocking upon it three times. She finishes with asking, "Hanako-san, Hanako-san, are you there?" To which Hanako answers and Yashiro screams at the sight of a boy in the girls' bathroom. After Yashiro's hand passes through Hanako's body, he explains that he is the third-generation spirit of "Hanako-san of the Toilet." Yashiro asks why Hanako is a boy to which he explains that there were no other volunteers, and it is not a popular position. He also explains that there had been more supernatural activity in the girls' bathroom and that's why he's there also that it's too much of a hassle to change the name.

Hanako asks for Yashiro's name and what her wish is. Yashiro wishes to curse death upon her first boyfriend who, she caught cheating on her with another woman. When Yashiro asks why he was with the woman when he told her that she was the one he loved the most, he answered by saying that he was just playing with Yashiro. He also mentions that he could never be in a serious relationship with someone who had radish ankles like her. Yashiro breaks her composure in front of Hanako shouting about how her ex-boyfriend is a "leg pervert." Hanako understands her wish but hesitates and Yashiro believes he will try to stop her murderous thinking however, Hanako only mentions how he only has a kitchen knife. He makes his way to the roof where the victim of Yashiro's wish is but Yashiro runs to stop him. Hanako only says how he has more of a domestic style so he can't change weapons and Yashiro asks if he's going to try and stop her. Hanako simply asks why and if she wants him dead to which Yashiro says yes. Hanako passes through Yashiro and she runs up to the roof.

Yashiro says that she still can't forgive her ex but that she still loved him enough to not want him dead. She arrives at the rooftop and tackles the ex- boyfriend in question instead of Hanako. Yashiro comes to the realization that there was no way that Hanako could kill humans because his knife could also pass through a person just as Hanako does. She mentions to Hanako that the rumors say that "Hanako-san is the guardian of the school" and he clears the misunderstanding saying there could have been a mix up over the years. Yashiro's ex boyfriend asks why she is talking to herself and calls her "disgusting" to which Yashiro angrily asks to "express her love." Yashiro then beats her ex-boyfriend till he is unrecognizable while other witnesses flee the scene with fear of being the next victim. After Yashiro finishes her beating, Hanako says that he's glad Yashiro came to stop him and that if she ever had anymore trouble, she could come to him. Hanako asks Yashiro is she will ever use the bathroom in the future and Yashiro shoots his offer down.

It's revealed that Kou was spying on Hanako from a nearby roof calling Hanako a "monster." He starts to promise on his grandmother's honor that Hanako would be exorcised by him but is interrupted by someone telling him to get down because it's dangerous. Kou says he would get down but not before warning Hanako (who was too far away to even hear) that he would strike soon.