Emukasa

Tsukaemu is the het ship between Tsukasa Tenma and Emu Ootori from the Project SEKAI fandom.

Canon
In the main story, WonderlandsxShowtime. Emu appears out of nowhere, and Tsukasa gets surprised. Emu welcomes him, while he’s confused. He asks her where she came from, and she answers. also saying she wanted to surprise him. After, she introduces herself and welcomes him once again. She also asks to make a wonderful show together, though Tsukasa is still confused. They talk a little more, and Emu complimenting Tsukasa, says with him she’s sure they can gather a full audience. And Tsukasa begins talking about wanting to be a star, but she ignores him, and says that when she was listening to his audition, her head said with him they can make a great stage. Tsukasa makes a autograph for Emu, and she calls it cool handwriting, and thanks him. He then walks away, but she stops him and tells him to do a show together, because it’ll be fun. She then begs for him to the show together, but he still doesn’t accept.

Later, Emu calls Tsukasa star, saying stars like him can make a place like that, which she believes is amazing. While Tsukasa ignores her. Kaito then begins explaining everything to Tsukasa. Emu says that a show with all of them, including Tsukasa sounds fun. Though, Tsukasa then falls down, passed out. and Emu in shock yells his name.

When Tsukasa wakes up, Emu is already there. And, asks him if he’s okay, while he still assumes that was a dream. Tsukasa says he’d do anything to leave, and Emu once again asks him if he’ll do a show with her at Wonder Stage. and this time, he accepts the offer. Emu says it’s a promise, and begins thinking about where to find his Smartphone. She easily finds it, and hands it over. He then teleports back to Wonder stage, and Emu asks Tsukasa to make a show together, once again. Later, Emu tells Tsukasa to stop fighting with the animal costume, and calls Tsukasa a important friend. When Tsukasa, finally actually accepts her offer, Emu thanks him and says she’s happy. The two then go to find more members.

Fanon
Tsukaemu is a popular ship in the Project SEKAI fandom, and has many fan art. Tsukaemu sailed mainly due to Emu always trying to help Tsukasa. On AO3, The ship has 17+ Romantic works.