Imperfect show carried by the performance of Roh Jeong-eui.
The entire premise is based on the believability of the lead being naturally compelling even as she actively withdraws from the world.
Aside from her excellent performance, the male lead does fine, but the writing lets him down a bit with some of the questionable character actions. Also, I think there were some production challenges behind the scenes as the episode count is a bit low and the ending feels a bit rushed, which hurts the supporting characters development.
The atmosphere is excellent, hitting that slightly otherworldly tone throughout.
Watch if you're a fan of Roh Jeong-eui and can love deeply while being intensely rational.
