After traveling from Tokyo to Okinawa, Haruka is met by her cousin Kanata who takes her to their grandmother's house. There, Haruka is in awe at the beautiful ocean that stretches out before her and encounters two girls playing beach volleyball.
Haruka promises Narumi and Ayasa that she'd play with them again without giving it much thought, but they happen to be the national champions. Haruka starts training with Kanata, who plays beach volleyball herself, for the rematch that's in a week.
Haruka encounters the twins, Claire and Emily at the school she's about to transfer to. Haruka learns that they're trying to gather members for the beach volleyball club and she instantly wants to join.
Haruka and the others enter a volleyball tournament. To prepare for the tournament, they all practice hard but Haruka feels like she wants to catch up to Kanata. Because of that, she secretly starts training with Claire.
The beach volleyball tournament has begun. Haruka and Kanata's first opponents are Ai and Mai, who they fought over the swimsuits with. Haruka is out for revenge, but Ai and Mai have their own reasons for wanting to win.
Haruka and Kanata win the first set but have a much harder time with the second set. Claire and Emily won their first match quickly and watch Haruka and Kanata play along with Sora.
Kana Yūki
Voice
Saki Miyashita
Atsumi Tanezaki
Rie Suegara
Emily Thomas
Miyuri Shimabukuro
Narumi Toi