I feel Seo Dong-won is not convincing

For me, Seo Dong-won's work in Rhapsody for the Dead (2025) is easy to talk about after watching. Some emotions are too simple, and I cannot believe the character enough. I do not hate it, but it did not pull me into the story. The role needs more detail, but the performance stays on the surface. Many moments pass very fast, and I do not remember much after them. For me, it does not feel very real in many scenes. This is only my personal view, but the performance changed how I enjoyed the film.