Aoimei

Aoimei is the femslash ship between Akane Aoi and Shijima Mei from the Toilet-bound Hanako-kun fandom.

Canon
In canon, the two have had no interactions whatsoever. The closest they've come to acknowledging each other was in Chapter 43 of the Manga, Picture Perfect (Part 3), when Aoi tells Nene and Kou about 'No 4. Shijima-san of the Art Room.' Shortly after this, Mei makes a comment about how her drawings, Aoi and Akane, are faulty and slices their canvases in half, temporarily disabling both of them.

In a Halloween Event on Twitter hosted by AidaIro, Aoi and Nene becomes witches and accidentally turn people into candy. Sakura explains to them that all they have to do is eat the candy and they will turn back to normal, but at the cost that the person inside the candy eaten will temporarily fall in love with the eater. Later in the event, Aoi eats Mei's apple, and Mei falls in love with her.

After the event ended, AidaIro started to post 'Halloween Aftermath' images featuring popular ships such as Hananene, Aoikane and NatsuSaku. In Mei's drawing, she is seen being poked by her twin sister, asking if she is jealous that she keeps spending time with Aoi.

Fanon
The ship was not popular until the Hanako-kun of Magic event started. After Aoi and Mei's drawing, fans started to ship them together more and more. However, it is still considered a rarepair as the two have more popular ships such as Aoikane and Aoinene for Aoi and Meinene for Mei. Not a lot of fan art features the two alone together, nor is there a lot of fan fiction. There are currently 2+ works on AO3 depicting the pair.

Fandom
FAN FICTION

Trivia

 * Both of them have counterparts that are linked with a School Mystery