When Hinata suggests that the team goes on a roadtrip to Kyoto for their victory trip, Suga is quick to jump on the idea, thinking it would be a good time to bond with his teammates after their big match. Unfortunately, Tsukishima and Yamagutchi decide not to go, but everyone else agrees. It's become obvious to Suga (though maybe not the others) that Kageyama and Hinata are dating. Their attempts to hide it consist of amping up their rivalry, but Suga, unlike the others, always catches them when they smile at eachother after a particularly good game, and their holding hands as they leave the gym. The way they use eachother as stands when they've finished practice. It's becoming increasingly obvious, and Suga is to a point that he can't stand the fact that they won't tell anyone.