A saved-up story with 〜ておく
Grammar Explanation: Doing in advance with 〜ておく
Chiya has a saved up story that fits the occasion.
- 千夜:
- 「とっておきの話があるの」
とっておき acts as an expression (取る + おく), with a meaning along the lines of “to set aside; to keep in reserve; to hold on to”.