Atsumu was listening to Sakusa's music, Until he saw his tweet.

"Another live performance tomorrow i guess-"

Atsumu immediately bought the tickets online. the VIP tickets actually. Atsumu was actually so excited he'll see his favorite rockstar perform live on stage again.

The next day, Atsumu immediately started getting ready immediately. He wanted to be the first. So when he got there, The guards checked his ticket, VIP. and The guards led him in front of the stage.

When sakusa came out, He saw Atsumu. Atsumu looked familiar.. It's like he met him before. So right after sakusa finished the performance, He told Atsumu to come back stage.