Mitsunene

Mitsunene is the het ship between Yashiro Nene and Mitsuba Sousuke from the Toilet-bound Hanako-kun fandom.

Canon
Prior to the story, Mitsuba took pictures for Nene's gardening club back in middle school, but the two did not formally meet until the Hell of Mirrors Arc after the disembodied hands brought her to him.

At first sight, she thought that he looked handsome, cute and prince-like, but Mitsuba quickly shattered that impression by commenting on how fat Nene's ankles looked. Mitsuba then explained that he was trapped in the boundary and he purposefully acted cute and innocent in front of Nene so that she could feel bad for him and try to help him out.

Later, he revealed that he does not remember anything about his former life or the cause of his death, and that's likely why the mirror boundary hadn't attacked him yet.

When the 3rd School Mystery's minions began attacking them and Nene was caught, he tried to save her by throwing items at their attackers, but instead he ended up getting himself caught.

Mitsuba also seems to be pretty fond of Nene as a Senpai despite insulting her at first. He tried his best to protect her from falling debris with his new powers, and tried to impress her by exclaiming that he's gotten stronger now, even though Nene didn't understand what he meant. When he forcefully pulled Nene, Kou, and Hanako out of the mirror boundary, he thanked her and then told her to keep quiet, and that they would see each other again soon.

Nene has decided to take on the role of a Senpai/Older Sister Figure towards Mitsuba since he is younger and more inexperienced ,she is also very nice towards him despite him making fun of one of her biggest insecurities. She also seems to think of him as a puppy, and is worried about his well-being, especially whenever he's around Tsukasa.

Fanon
The ship sailed as a result of Mitsuba and Nene's friendship and how funny their interactions were. A lot of people love how the two still care for each other despite Mitsuba's cocky attitude they still managed to form a close bond. But it naturally loses popularity towards the two's more popular ships like Mitsukou for Mitsuba and Hananene for Yashiro. Fans like to joke around and say that Mitsuba is Nene's "Gay Best Friend" and Nene just tends to roll with it.

It currently only has a little over 20 fanfictions on Ao3 and even then most of the tags are put into the 'Friendship Section' however most fans don't seem to mind seeing as though their interactions are minimal and they both have more popular shipping choices.

Fandom
FAN FICTION

Trivia

 * Due to the Original Mitsuba dying at the hands of Tsukasa, Nene was technically the first friend that the new Mitsuba ever made.