Rascal Does Not Dream of a Beach Queen + (light novel)

It's the day of the Minegahara Sports Festival! Kaede, Rio, and Yuuma are all on the blue team with Sakuta. That is, until he gets stuck filling in for a beach volleyball junior athlete named Minagi Ootsu-who's nowhere to be found. The festival goes on with the Ball Toss and the Scavenger Hunt, and finally, Sakuta is free to eat lunch with Mai. On the way there, however, he happens upon Minagi in the last place he would have expected...