Count me in ! → 나도 끼워줘!

〔예문〕

A : Hey, Would you like to go to a movie with me on saturday night?
    토요일 저녁에 나랑 영화 보러 갈래?

B: A movie? With you? Of course! That would be wonderful!
   너랑 영화를? 물론이지 좋아!

C: Count me in ! I want to come, too.
   나도 끼워줘! 나도 가고싶어!