Best Mistake was good even maybe better than Be My Boyfriend until the last few episodes it just went down and down until it wasn't very good anymore, I'd have to say it was just quite average and the two leads liking each other felt forced on Yeondoos part, I get she started liking him but I didn't see any chemistry or anything on her part, more like she just dated him to date him. If she acted like she liked him in the last 3 episodes I'd understand them getting together but she seemed like she didn't care about him. Went downhill fast wouldn't recommend it honestly, there are better web dramas.