This is a good revenge-plot mini-show. The storyline is interesting and exciting. Only thing is that the subtitles in the version I saw (YouTube auto translate) made it hard to follow, especially in the last 4-6 episodes. I could guess most but it was a bit annoying.
Character wise:
We have a sweet and gentle FL who loses her parents in a drowning incident. That makes her develop a second fierce and strong personality who at some point appears to warn her about her husband and female friend and exert revenge.
ML is a cold and calculating man who marries a woman to get to her inheritance.
Acting wise this is very good and the actors do a good job within the limited timeframe.
So, if you like a fast and interesting revenge-plot show, this is actually worth watching.