Where is the prequel??
https://newtoki95.com/webtoon/405948?stx=%EA%B7%B8%EB%9E%98%EB%8F%84+%EC%A2%8B%EC%95%84%ED%95%B4&title=%EA%B7%B8%EB%9E%98%EB%8F%84%2C+%EC%A2%8B%EC%95%84%ED%95%B4Here ya go
Where is the prequel??