After finished watching, I now know why it's famous like some other bl dramas eventhough it's much more better than them. The ending sucked. They ruined everything at last

ACTING : All the actors done a fabulous job. I personally like the one who portrayed tofu/neung. Difference in Facial expressions, body language, every tiny details he showed between tofu and neung is truly remarkable.

Story : The story is somewhat messed up although it had so much potential as a concept. So many flaws and loopholes being justified throughout the show
First one is they made tofu look like neung is not a necessary but they made it so they could show a mystery for a couple episodes.
Tofu having his own memory and heart full of feelings just to get used and thrown out.
Nut's father expecting love from his wife. He clearly married her knowing she doesn't love him and it's benefits in his life. He just simply coveted his brother's love by scheming.
As for Nut, it's my first time I ended up hating a protagonist. (The actor did an amazing job) The character is a big Red Flag. If he really loved and couldn't move on from first love, he should have searched for him until he finds him. Since there is no one stopping him from doing so. His uncle did the extreme so that the woman he loved and her child could live the way they like. Even after tofu's actions start remind him, he didn't thought of finding him once. He just wanted a replacement for tarn and thrown away tofu once again he has tarn. ?
I was furious watching the ending. They should have let tofu die. They made tofu watch nut and tarn romance in front of him right after he died.
Only the women's characters are justifying regardless of whether they are good are bad. They are true to themselves.

PRODUCTION : I think the production team should have done a better job. Each episode has 1 and 1/2 an hour running time. But it's like watching watching it in 0.5x speed totally annoying.

I liked the drama only until ep 12. A potential story has been wasted I believe.