Hieronym said: I think it says this: コラ!! (Kanji)や ろんじゅない
Except for the Kanji, which I can't quite read either. My guess is the "Hey, Tatsuya! Don't go over there!" you'd expect, but it's guesswork.
I read it as 「コラ!!(Some kanji with a 「門」 radical) れるじゃない」, and my guess it mostly the same as yours, but well, I don't like to leave things to guesswork.
Ma-Madoka!!Wa... WAAAAAAAAAA!!Homura-chan...
Homura-chan...Hey!! Don't hang around her!I heard your voice! Are you playing a prank on me?WhisperWhisperStop hiding and come out!! Please!!I won't be angry, so please come out, Madoka!!Maroka! Maroka!Where are you?! Madoka, Madoka!!