This Korean series features strong performances from everyone involved, though it’s held back a bit by issues with the plot and how the characters are portrayed. Wonderful World manages to be good even with its flaws, mainly because of the superb acting delivered by the lead actress and supporting players. Their work really brings this story about loss, revenge, and finding forgiveness into focus. The series struggles with an over-the-top dramatic style and excessive emotionalism; it can shift between overly sweet moments and drawn-out suffering, occasionally bordering on ridiculousness. This approach damages the show’s believability, so it's a testament to the cast that they manage to make it engaging at all. Ultimately, it's enjoyable primarily because of the acting quality; the melodrama and sentimentality are somewhat distracting.

Source on TMDB