Akiairi

"At the same time, Akito's such a good little brother."                                                                            — Airi thinking to herself in an Area Conversation Between Airi and Akito.

AkiAiri is the het ship between Akito Shinonome and Airi Momoi from the Project SEKAI fandom

Canon
Airi is a second-year student at Miyamasuzaka Girls Academy, whereas Akito is a first-year student at Kamiyama High School. Airi is part of the idol unit MORE MORE JUMP! while Akito on the other hand is part of a street music group, Vivid BAD Squad. Both Airi and Akito are really outgoing and charismatic people, but Akito's personality tends to differ depending on how close he is to his peers. The two met in middle school, and she would always greet him when she visited the Shinonome household.

Airi and Akito met during middle school coincidentally, considering the fact that Airi is a close friend of Akito's older sister, Ena, who is the same age as her. Ena and Airi became friends when Airi stood up for Ena when was being made fun of for her appearance. Ever since then, they have not had many interactions with each other. Airi constantly reminds Akito to take care of Ena for her.