DaiSuga

DaiSuga is the slash ship between Sawamura Daichi and Sugawara Kōshi from the Haikyu!! fandom.

Canon
Daichi and Suga are both third years students at Karasuno high school, as well as they both play for the volleyball team. Daichi is the Captain of the volleyball team, whilst Sugawara is vice captain. They are shown to be close friends, having known each other since their first years. Sugawara is also the only one shown to be sometimes immune to Daichi's intimidation and is occasionally seen lecturing him.

They're both shown to care about the team a lot, as well as the future of it.

Fanon
Suga is a total mother-hen in fanfiction, and Daichi is usually shown as the "Team Dad". They take care of their "kids" and usually deal with all the angst the others put out.

Fandom
AO3

DeviantArt
 * daisuga tag on DeviantArt
 * Daichi-x-Sugawara fanclub on DeviantArt

Trivia

 * They both play for Karasuno.
 * They are both third years, so they will graduate soon.
 * They deal with Kageyama and Hinata's fighting a lot.