BL masterpieces that have live action

Korean Drama.
I love this manhwa. I have read it quite some time ago and got to know this one has a live action. Although the casting was good, i felt the way they changed a few things in the drama didn't quite sit right with me. I mean the reason I liked this manhwa was because of the complexity in the relationships but it was totally changed. I just was disappointed although the acting was good and the drama was actually quite well received by people who haven't read the manhwa.