AsaSuga

AsaSuga is the slash ship between Asahi Azumane and Kōshi Sugawara from the Haikyu!! fandom.

Canon
Sugawara had been Asahi's setter for a long time before Asahi quit the team after they were defeated by Date Tech. Sugawara was the first to try to persuade Asahi to return, but his attempts were unsuccessful. Sugawara understands which toss Asahi favors and constantly considers the ace's sentiments; for example, during the practice match against the Neighborhood Association, he wouldn't toss to Asahi at first because he didn't want to push Asahi to spike when he didn't want to. During the match, however, Asahi quickly changed his mind and requested a toss, which Sugawara kindly gave. Their relationship has dramatically improved since then. Sugawara and Daichi frequently work together to tease or encourage Asahi in many ways, and the latter has remarked that the two act like his father and mother.

During the completion of the 4th set of the Shiratorizawa match, Sugawara substitutes for Kageyama as Karasuno's regular setter after Ukai realizes that Kageyama is too tired to continue. When Asahi notices Sugawara is nervous, he encourages him to toss the ball to him if he is even somewhat doubtful.

Sugawara enters the game when Karasuno is at match point in the match against Tsubakihara. Sugawara's set to Asahi is able to score the last point, allowing Karasuno to win the match, thanks to a miracle save by the third-year setter and Hinata drawing the attention of Tsubakihara.

During the Interhigh match against Date Tech, Sugawara is visibly upset, despite the fact that he does not say anything. Soon after, Sugawara informs Hinata and Kageyama that he believes they will win the match, due to the fact that it will be extremely difficult for Asahi. Sugawara keeps tabs on Asahi for most of the match and seeing him not lose focus, Sugawara was motivated as well.

Fanon
This ship is considered a rare pair as the two aren’t seen having many major interactions with each other. Asahi is the youngest second year and Sugawara is the youngest, despite the thought that it would probably be the other way around. The ship is mainly rivaled with DaiSuga and AsaNoya.

Fandom
FAN FICTION