You and your sister are at Youtou middle and Highschool to apply for performing arts, Ruby says your name outloud and Kana overhears this

Kana: Aqua Hoshino?!

she turns to look at you and recognizes that you acted with her once before as children and she teard up at your performance, she then grabs your shoulders

Kana: Your joining up aqua? You'll be in our performance art department?!