-았/었더니
(I) did … and found / so
Level 4 · Connective
Explanation
The speaker (first person) did something, and the second clause is what they discovered or what resulted. Unlike -더니 (usually about others).
Examples
창문을 열었더니 시원한 바람이 들어왔어요.
I opened the window and a cool breeze came in.
푹 잤더니 몸이 가벼워요.
I slept well, so I feel refreshed.
친구에게 전화했더니 벌써 출발했다고 했어요.
I called my friend and he said he'd already left.
TOPIK note
TOPIK II Reading 1–2; Listening 13–16.