HiiAi

Hiiai is the Slash ship between Hiiro Amagi and Aira Shiratori from the Ensemble Stars fandom.

Canon
During their first meeting, in Chapter 2 of the main story, Hiiro allows Aira to stroke his muscles when Aira admits that he's jealous of them. The two are comfortable engaging in physical contact with each other, and both initiate it often. Hiiro also says that he'll protect Aira whenever he's scared, like in Chapter 26, when Aira screams and Hiiro immediately rushes over to help him earnestly (Aira hugs him as soon as he sees him). While

In Chapter 29 of the main story, Aira exclaims that he was just starting to like Hiiro, but after he almost threw away Aira's idol merch, the "Aira route" is no longer available for him. Hiiro didn't understand but apologized sincerely, which caused Aira to feel bad, admitting he was being too arrogant and apologizing as well. Though Aira acts annoyed with Hiiro a lot, the pair truly care about each other and grew to have a strong bond.

Fanon
Hiiro Amagi and Aira Shiratori have been widely accepted as one of the main couples of the new main story. Their relationship has not only gained the attention and approval of fans but even Hiiro's older brother, Rinne Amagi, has acknowledged the relationship in-game by adopting the nickname 'Girlfriend-kun' for Aira. Sometimes Aira might say things like 'I hate you' or 'You are not going down the Aira-kun route', but it is very obvious throughout the main story that Aira loves Hiiro very much and cares for him. However, the ship is not actually canon. A lot of their interactions come from the !! main story. HiiAi is sometimes shipped alongside other ships like RinNiki and TatsuMayo.

Quotes
"I have a lot to talk about with Aira because we're around the same age. He is a very precious friend who always brings clever comebacks to my words ♪" - Hiiro in his idol rank C conversation

Fandom

 * WIKIS
 * https://enstars-ships.fandom.com/wiki/Hiiro_Amagi/Aira_Shiratori
 * https://ensemble-stars.fandom.com/wiki/Hiiro_Amagi/Relationships#Aira_Shiratori
 * https://ensemble-stars.fandom.com/wiki/Aira_Shiratori/Relationships#Hiiro_Amagi

Trivia

 * Kohaku Oukawa, being Aira's close friend, believes that Hiiro is Aira's sweetheart.
 * Hiiro has told Rinne, who he holds a great amount of respect for, to lay his hands off Aira (藍良に触るな！) when Rinne was trying to search for suggestive magazines under Hiiro's bed.
 * When Hiiro was feeling down over Rinne leaving him behind to face the idol industry for himself, he was not found until Aira did. On their way back to their unit's dorm, Aira carried Hiiro on his back.