1 Work by guren666 in Haikyuu!!
Tsukishima asks a favor from Yamaguchi, because he's the only one he can ask. But there is a tiny problem - the favor entails pretending to be Tsukishima's boyfriend in front of Kuroo, who for some reason asked him out several times and each time he declined. Kuroo has grown more suspicious of the continued rejections, so he asks if he's seeing someone. Then he promised he'd give up on him if brought the person he's going out with.
However, when they meet with him, they are overseen by Yachi, for whom Yamaguchi has feelings...