C2164 Don't You Know You Knock on the Door

Susu stared at him and let out a long sigh of relief. "Say, don't you know how to knock on the door before you come in?" Seeing the assistant in front of her, Susu couldn't help but roll her eyes.

Hearing Susu's words, the assistant awkwardly smiled and whispered, "Sorry, Sister Susu, I only broke in because I had a very urgent document I needed you to sign. Sorry, I'll remember it next time