AsaNoya

AsaNoya is the slash ship between Asahi Azume and Yu Nishinoya from the Haikyu!! fandom.

Canon
Asahi's a 3rd year and Nishinoya's a 2nd year, both on the  Karasuno High School volleyball team. Respectively, Asahi's jersey number's 3 and Nishinoya's jersey number's 4. Also their positions: Asahi being the ace/wing spiker and Nishinoya being the libero, also pair nicely together. Throughout the seasons, both characters have a strong friendship and also help one another out during training and games.

In the first season, after Karasuno win their first practice match against Aoba Johsai ( Seijoh ) the team talk about how they're missing players, with Kageyama pointing out that they don't have a libero ( who specialises in defence ) or an ace ( a powerful player who can smash through a triple block. ) Daichi reassures him that the 'Guardian Deity of Karasuno' ( Nishinoya, but doesn't say during that time ) will be returning. He's been out, due to getting suspended for a week and banned from club activities for a month.

When Kageyama practises aiming his serve, Nishinoya rushes in to receive it, perfectly aiming it towards the setter's position. After being acquainted with the 1st years and reuniting with the 2nd and 3rd years, he asks is Asahi's back. However, the others reluctantly stay quiet, with Nishinoya getting angry and calling Asahi a wimp. Later on, in flashbacks to March, when they played against Date Tech, they suffered a terrible loss, with most of Asahi's spikes shut out. In Karasuno's gym, both get frustrated and take the blame, as Asahi couldn't spike pass Date Tech's blocks, and Nishinoya failed to receive the ball. In addition, Nishinoya angrily asks Asahi why he didn't call for the ball the last rally.

During the Tokyo training arc and up to the Spring High Tournament, Nishinoya helps Asahi with his serves. Also, Asahi helps Nishinoya by spiking his tosses/sets.

Later on in the future, Asahi also goes to Nishinoya, asking his opinion about him going to study fashion in Tokyo.

Fanon
AsaNoya is shown as a loving and caring ship. Though they both have very contrasting personalities: Asahi being shy, quiet, wimpy and sometimes negative, and Nishinoya being loud, positive and full of energy, the two care for each other, having the others back.

In fanart, both characters are shown to be caring towards each other. This includes Nishinoya conforting Asahi when he's scared. Also, Nishinoya sometimes pushes Asahi to become stronger and to come out of his shell, while Asahi tries to calm Nishinoya down.