It's not a halluncination, she's just angry as hell at that jerk and that's where the chapter ends at a cliffhanger (which is normal). I think the confusion mainly is due to bad editing by the team who translated this chapter.
Here's the raw, it fades to white at the end like the chapters usually ends: https://newtoki95.com/webtoon/13949567?stx=%EC%95%85%EB%85%80%EA%B0%80+%EC%82%AC%EB%9E%91%ED%95%A0+%EB%95%8C&toon=%EC%9D%BC%EB%B0%98%EC%9B%B9%ED%88%B0&title=%EC%95%85%EB%85%80%EA%B0%80+%EC%82%AC%EB%9E%91%ED%95%A0+%EB%95%8C+53%ED%99%94&spage=1
Okay thank you haha
Its np
What? Ayo what just happened in the last few panels and why was the background black instead of white? Does it mean it was an hallucination or something? Someone help