Mafuemu

Mafuemu is the femslash ship between Mafuyu Asahina and Emu Ootori from the Project SEKAI fandom.

Canon
Mafuyu is a second year at Miyamasuzaka Girls' Academy. Emu goes to the same school, although she is a first year. Mafuyu is a part of Nightcord at 25:00 while Emu is a member of Wonderlands x Showtime. Though they are not in the same group, they have quite a few interactions. For example, Mafuyu's winter lines and the sports festival event.

Mafuyu is known and admired for being a "good girl", but in reality that is a mask. Mafuyu seems to have a lack of emotions. Emu is extremely cheerful and impulsive, and wants to make everyone around her smile. Emu knows that Mafuyu isn't really smiling when she smiles, and has made it a goal to make her smile for real. However, she is also extremely terrified of Mafuyu's fake smile.

Run! Sports Festival! Committee Rush
When meeting, Emu asks Mafuyu if they’ve met before, while Mafayu ignores the question, introducing herself. Mafuyu says it’s nice to meet Emu, and she says the same back. While Mafuyu’s fans and friends are cheering her on, she says her and Emu will do their best, which Emu is too surprised seeing her fake smile to respond, calling her scary in her mind. Later on, Mafuyu tells Emu to do her best, and the two begin racing. When the race is over, Mafuyu says she couldn’t have won without Emu, but once again Emu gets scared by her smile.

Fanon
Mafuemu is heavily overshadowed by ships in Mafuyu and Emu's own groups, such as Mafuena and Kanamafu on Mafuyu's side, and Emunene and Tsukaemu on Emu's side. On AO3, the ship manages to have 11+ romantic works, and 9+ Gen works. People enjoy the dynamic of the usually cheerful Emu being terrified by Mafuyu's smile, as well as the dynamic of the cheerful one and the depressed one. They also like the way Emu tries to make Mafuyu show her true smile. This ship remains mostly a rarepair throughout the fandom.

Fanfiction
Mafuyu/Emu tag on AO3

Trivia

 * Mafuyu is the only character Emu is scared of.
 * Mafuyu has a line asking Emu not to run through the halls.