Kageyama's world has always been a little dark and lonely, but he's used to it. One day, when he notices Hinata being oddly unsociable, they get to chatting and Hinata finds out that Kageyama's never been to karaoke! Hinata makes it his mission to mentor his poor deprived teammate in the ways of "Having fun outside of volleyball." However, after a while, Kageyama is disturbed by the multitude of people who keep telling him the same thing: "You've changed." He's not sure change is a good thing... and it's all because he got a little too close to the sun.