Airiemusaki

Airiemusaki is the poly ship between Airi Momoi, Emu Ootori and Saki Tenma from the Project SEKAI fandom.

Canon
Airi, Emu and Saki all attend Miyamasuzaka Girls' Academy, and Airi is a year above Emu and Saki. The three girls all have pink hair, though Saki has blonde hair and pink tips. Emu and Saki are both fans of Airi and have watched shows she was on.

Operation ♡ Secret Valentine!
Emu and Saki bump into each other while they're both deep in thought, and Airi checks to see if both of them are okay. Emu recognizes Airi as the person who did the lion dance on the Good Morning Show. Emu says that she loved the lion dance, and she does it together with Airi. Airi thanks Emu for watching the show and says they should dance together again sometime. Airi learns that Emu puts on shows at Phoenix Wonderland, and she mentions that she went to see a night show there. Emu tells Airi that she, along with everyone else in Wonder Stage, thought up the night show, and she expresses her gratitude to Airi for watching the show.

The three girls form an alliance since they all want to make surprise gifts to show their appreciation to everyone. Airi starts calling Saki and Emu by their given names, and Saki tells Airi that she'll always be her fan. Emu calls Airi "Airi-chan" before apologizing and correcting herself to say "Momoi-senpai." However, Airi says that Emu doesn't have to be so formal, and she tells Emu to call her whatever she'd like. Emu then calls Airi "Airi-chan-senpai," which Airi calls a cute choice. Airi says that she'll be sure to take care of such cute kouhai, referring to Saki and Emu.

Airi and Emu go to the mall with Saki to get the ingredients for what they’ll make. The next day, the trio bakes the sweets at Saki’s house. When Tsukasa, Ichika and Shizuku show up, Airi lies to them by saying they were doing dance practice and Emu had been thinking a lot about dance for her shows. Airi says that Emu and Saki are her cute kouhai to her, and she wanted to help them out.

Airi, Saki and Emu all successfully make the sweets and give them to their friends.

Fanon
Airiemusaki is a rarepair, though it has a decent amount of fans for a small ship. It's normally shipped by people that can't decide between Airiemu, Airisaki and Emusaki. Most people started shipping it because of the "Operation ♡ Secret Valentine!" event. Though it's rivaled by more popular ships like Shizuairi, Ichisaki and Emunene. There's a decent amount of fanart for the three.

Fandom
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Variations

 * Airiemu refers to the ship between Airi and Emu
 * Airisaki refers to the ship between Airi and Emu
 * Emusaki refers to the ship between Emu and Saki