This exchange from Episode 8
Kisara: Good morning, Satomi-kun, I'm coming in.
(Rentaro and Enju wake up)
Rentaro: Could you say that before you get in?
Kisara: Shut up, I've come to take back Tina today, Huh? Where is she anyway?
(Tina crawls out from under Rentaro's blanket)
Tina: Good morning. Wasn't last night fun, onii-san? Though it was scary at first, I'm happy that you taught me a lot of things.
(Cue shocked looks from Rentaro, Enju, and Kisara)
Kisara: I-I'm calling the police...
Enju: Tina beat me to it!