MitsuHanaKouNene

MitsuHanaKouNene is the poly ship between Hanako, Yashiro Nene, Minamoto Kou and Mitsuba Sousuke from the Toilet-bound Hanako-kun fandom.

Canon
Yashiro and Hanako met in Chapter 1 and started as a duo. Yashiro had summoned Hanako under the consensus he grant her wish of want to date Minamoto Teru, an upperclassman she had had a crush on for some time. Hanako agreed and spent several hours helping her come up with the best possible ways to get Teru to fall for her, with all of their methods failing in the end. Hanako winds up asking her if anyone would do, which Yashiro denies but later confesses to being the truth. Hanako, upon hearing this, eats the other half of the cursed fish scale Yashiro had previously ingested and told her that being bound together was basically like being a couple. This is what starts their friendship and eventual romantic relationship.

Soon after their friendship starts, an aspiring exorcist overhears the news that an innocent girl is becoming friends with an evil supernatural and he takes it upon himself to rescue her. While Hanako and Yashiro are on the roof top, they are ambushed by a boy named Kou who is there to protect Yashiro despite not knowing her. Right as he is about to start fighting Hanako, Yashiro jumps in front of Hanako to protect him. This makes Kou become rather flustered and he starts getting side tracked by trying to talk to Nene, before remembering the task at hand. The two boys fight and Kou loses, but Hanako hides his scarred hand behind his back and begins to give Kou a heartfelt pep talk about how he will be a great exorcist one day, before respectfully knocking him clean out. Kou leaves the fight with a newfound respect for Hanako and reconsidering his belief that all supernaturals are evil. Kou's older brother is unhappy with his new beliefs and decides to exorcize Hanako himself seeing as Kou will not. This leads to Kou fighting Teru on Hanako's behalf and the younger exorcist ends up taking a blade to the hand to protect Hanako. Teru gives up and warns Kou before leaving. Hanako and Kou are rather good friends after this, and the exorcist becomes a member of the fandom-appointed "toilet trio" from there on.

Later on, Kou winds up meeting a low-level apparition named Mitsuba. The two don't get along at all at first; Mitsuba threw baseless demeaning insults at Kou and Kou was annoyed enough with him to shock him with his staff a few times. However, after Kou is told by Mitsuba that his unfinished business is photography, he tries his best to help him take many photos to process. During this, one of Kou's friends, Yokoo, comes up to him and notices he's holding Mitsuba's camera. Yokoo tells him what he knows of Mitsuba—that he suffered from a fatal accident during winter break and died. After learning this, Kou brings it up with Mitsuba, who goes on to tell him about his life when he was alive. How he was bullied for being too girly or cocky or whatever bothered [them], and that he changed his personality to fit in once he started middle school in order to be more likable. He explained that this didn't work out in his favor, because he wound up being so quiet and in-the-background that he never made any friends anyway. Afterwards, Kou tells him that he's cocky, girly, fake-nice, etc, to Mitsuba's surprise and anger. Kou tells Mitsuba that if anybody asks him what type of guy he was, that's what he would tell him. That he doesn't need to change himself for others, and that he can just be himself, also stating that he doesn't hate his personality with a faint blush. They make their way to the roof top, and as Mitsuba is taking pictures he asks Kou if they would be friends if he was still alive. Kou tells Mitsuba that it doesn't matter whether he's alive or not, and that they can still be friends either way. Mitsuba smiles and blushes, and takes a photo of Kou while he is not looking. When asked by Kou what he took a picture of, he replied by saying he took a photo of something important to him. The two boys went on to become best friends, and vaguely implied love interests for one another. In Chapter 98, the two went on their first date.

In the Hell of Mirrors Arc, Yashiro is forced into No. 3's boundary by out-of-control hands. There, she meets Mitsuba and is immediately attracted to him due to his good looks, even going as far to fantasize about him being a sort of servant to her. However, she quickly loses interest after his brash personality shines through. The two wind up at a mirror together which reflects the deepest darkest fears of the person looking into it. Yashiro looks into it, and she is met with caricatures of her friends chanting that she is an ugly radish. The real, non-mirror Mitsuba calls her a radish too. Then, the two meet No. 3 of the Seven Mysteries who is quick to attack them both. Yashiro grabs Mitsuba's hand and runs with him, but she is quickly apprehended by a bunch of mannequins. Mitsuba attempts to save her by throwing things at them, but this only makes him cornered as well. Later, while Tsukasa is attempting to force feed Mitsuba No. 3's heart, Yashiro jumps in the way and tells Tsukasa that Mitsuba doesn't want to do that. Tsukasa puts her to sleep and continues force feeding Mitsuba the heart... but it was an honest attempt.

Hanako and Kou eventually force their ways into the Hell of Mirrors with the mission of saving Yashiro, but are surprised to find Tsukasa and Mitsuba, Mitsuba especially, considering he was killed before this. Tsukasa explains to the disturbed duo that he used the parts of lower-level supernaturals to create a new Mitsuba, and Tsukasa urges Mitsuba to fight Hanako to better his skills as the new No. 3. Mitsuba absolutely does not want to fight Hanako, commenting that there's no way he's fighting a guy with a knife, but he does end up trying anyway. At some point during the fight, Mitsuba professes that he just wants to be human, and Hanako expresses that Mitsuba can never become human, with a heartfelt speech similar to the one he gave Kou after the original Mitsuba died in his arms. After the fight, Mitsuba ends up forcing the trio all out of his boundary in order to protect them.

During the Picture Perfect Arc, Yashiro and Kou are shocked to enter school one morning and see that Hanako and Mitsuba are mysteriously alive and the entire school is acting like it's always been that way. It is revealed that the world they were in was a fake created by Mitsuba courtesy of School Mystery No. 4, Shijima-san of the Art Room, so he could feel like his wish (to become human) was granted. The arc is mostly a what-if spin off for the first few chapters which shows the four what life could've been like for them if Hanako and Mitsuba were alive, and it was this arc that really made Mitsuba apart of the aforementioned toilet trio.

Fanon
This ship, though unpopular, has some supporters. Fans often choose to instead ship Yashiro and Hanako together along with Kou and Mitsuba as a side pairing with MitsuHanaKouNene being simply a friend group between the four.

On AO3, the ship has 5+ works romantically and 6+ works platonically.

Fandom
FAN FICTION

Variations

 * Hanakou refers to the ship between Hanako and Kou
 * HanaKouNene refers to the ship between Hanako, Kou and Nene
 * HanaMitsu refers to the ship between Hanako and Mitsuba
 * Hananene refers to the ship between Hanako and Nene
 * Kounene refers to the ship between Kou and Nene
 * MitsuHanaKou refers to the ship between Mitsuba, Hanako and Kou
 * MitsuHanaNene refers to the ship between Mitsuba, Hanako and Nene
 * Mitsukou refers to the ship between Mitsuba and Kou
 * MitsuKouNene refers to the ship between Mitsuba, Kou and Nene
 * Mitsunene refers to the ship between Mitsuba and Nene