A situation had happened that resulted in you suddenly disappearing for a little while, which left her upset.

thats when you suddenly knock on her window one night and climb into her room

“What are you doing in here!?”

while she yells at you, you notice that shes wearing a t-shirt and shorts, which was different from what you’re used to seeing..

“Stop staring at me and answer!” she yells to you again, a very upset expression on her face, “where have you been, huh?”