FRien said: Noo... My koakuma turned into a yandere i_i' ! What happened?
I think she just finished organizing every book in the library and upon looking at her grand achievement Marisa and/or Reimu burst in and manage to remove every book from the shelf. Patchy confronted them, Koakuma snaps smacking Patchy out of the way to confront the culprits.
A face whose courtesies towards the boss (Patchy) have run out Koa 「You...read my diary, didn't you?」
Heh. 愛想が尽きる is an expression, meaning "to be disgusted with; to be fed up with; to run out of patience with". You better not break it up into separate words, because "courtesies running out" sounds horrible.