Aiyuu

Aiyuu is the Slash ship between Aizo Shibasaki and Yujiro Someya from the Honeyworks fandom.

Canon
Aizo and Yujiro are members of the idol unit LIPxLIP. Both attend Sakuragaoka High School and are in the same class.

Aizo has had experience singing before he joined LIPxLIP. During his childhood he used to sing for his father and mother but those days didn't last long. His parents began arguing everyday and eventually got divorced. His singing was shunned out by his mother due to him being "loud" and would not sing again until he joined LIPxLIP. In public, Aizo is a sociable character, chatty and friendly to everyone he meets. However, he's actually more prone to being irritated, making others butt out of his business by snapping at them, being more visibly angry with Yujiro, and preferring to be left alone.

On the other hand Yujiro joined a traditional kabuki family due to his mother remarrying when he was younger. Yujiro never had a good relationship with his stepfather and stepbrother and his father later disinherits him from the Someya's kabuki legacy although he threw away his entire childhood for Kabuki. For public appearances, he is described as "refreshing, kind, and cool". His actual personality is a much different person. He appears to be aloof and a bit hard to read, and can get rather open about his displeasure with certain subjects.

Both first officially met each other at an idol audition. Although they signed up separately, due to their impressive performances, they were chosen to be a unit.

Fanon
Aiyuu is the most popular ship for both Aizo and Yujiro. They are rivaled by Yuuhiyo and occasionally Aimona. It is most popular pairing in the idol series and a very popular pairing in the series overall. Many fans were drawn to their relationship from the songs Yume Fanfare, Samishigariya, and Non-fantasy where it is hinted that they kissed. They are often shipped alongside Hiyomona and Ascana.

Fandom
FAN FICTION

Aizo/Yujiro tag on AO3

TUMBLR

Aiyuu posts on Tumblr

PIXIV

愛勇 posts on Pixiv

Quotes
"Aizo – 'If I end up making a mistake again, I have Yujiro.'"

Trivia

 * Aiyuu parallels Shibarisa as seen in Samishigariya
 * Aizo is a cat person while Yujiro is a dog person.
 * Yujiro and Aizo's birthdays are on the same date (February 22).
 * Ai♡yuu was originally going to be their unit name.
 * Aizo is hinted to have romantic feelings for Yujiro as seen in Samishigariya and the novels.