I had my doubts already, which is why I said "if that really is her".
I found the movie. It's the first scene from KNCS-063. See the first row of
this set of screenshots.
Sougouwiki lists the following actresses: Chika Arimura (有村千佳)/ Mint Suzuki (鈴木ミント)/ Aozora Konatsu (青空小夏).