게 아니라고

it's not that

→ 것+이
phrase Rare #27,544
it's not that Used to deny or correct an assumption; 게 is a shortened form of 것이, and 아니라고 presents the denial as something being said or insisted upon.
KO: 내가 너를 싫어하는 게 아니라고.
EN: It's not that I dislike you.

놀러 온 게 아니라고

I didn't come here to have fun.

— 천공의 성 라퓨타 (1986)