Responses
WAIT SO IS THIS NOT ACTUALLY A ONESHOT??!!
The page says it is a "prologue webtoon", or what is more typically referred to as a promotional webtoon for the web novel. The other chapters listed are the novel itself.
https://page.kakao.com/home/%ED%99%A9%EB%85%80%EB%8B%98%EC%9D%98-%EC%9D%B8%ED%98%95-%EA%B0%80%EA%B2%8C%5B%EB%8F%85%EC%A0%90%EC%97%B0%EC%9E%AC%5D/54784912