Kaori continues avoiding people in class. One day, when Yuki is called out by Inoue-sensei during lunch and Kaori is waiting on the roof alone, a girl appears...

To welcome Kazumi and Kotori as members, the astronomy club goes stargazing on a mountaintop. Then Kana sees a forecast that wrecks the atmosphere.

Eiichiro is about to play his first match. He receives advice from the other STC members, but it only makes him more nervous. He doesn't get a chance to calm himself down as he's soon called to the tennis court. His first opponent is Oobayashi Ryo, a player with five years of experience, the assistant captain of the tennis team at Shonan Tech, and a top eight finalist in the prefectural tournament. It's finally time for Eiichiro's first match!

Kageyama is improving his natural skills as setter, and Hinata has natural speed and spring. When the two of them get synched, their combination brings them victory in the three-on-three match. So they are officially accepted as members of the Karasuno High School Volleyball Club.

The Kawai Complex residents (really just Mayumi, Sayaka, and Shiro) are fooling around in the living room as usual. Amidst the chaos, Ritsu's lips and Usa's arm connect. Ritsu's face is bright red as she storms out of the room. The next morning, she is still noticeably unsettled, which Usa finds very endearing.

Kamui and Misaki go to the airport to meet the jetsetting Koutei for info on the Quatre Knights, but why doesn't he remember his old friends and rivals? Then, two more international Vanguard fighters show up. Are they the other two ultra-powerful members of Quatre Four?