Place it immediately after the line proposing the bad idea, then follow with a shocked sound for the stunned reaction, or an oh no no no laugh when the refusal turns playful in a longer montage sequence.
이 사운드에 대해
This is a very short voice clip, just over half a second, of someone named Alex delivering a single forceful word: 'Nein,' the German for no. There is no music or extra effect, just that blunt refusal landing all at once. It feels abrupt, stern and funny at the same time, like a door slamming shut on a suggestion.