Everyone was waiting for Daichi to open the doors of the gym so they could train, when Hinata pointed at a girl and yelled causing everyone to turn around

Hinata: "Oh! That girl looks like Suga-san!"

Yamaguchi: "Hinata... It's rude to point fingers at people" Tsukishima laughed out loud as he laughed at Hinata, then Sugawara spoke up causing everyone to be quiet

Sugawara: "Oh! She's my little sister!"