Love Song For Illusion
환상연가 (original)
It tells both the heart-fluttering love story and fierce obsession of a King with two opposite personalities and an assassin girl who wants to kill him but ends up falling in love with him.
Starring Park Ji-hoon, Hong Ye-ji, Ji Woo, Shin Gi-hwan, Kim Dong-won, Hwang Hee, Woo Hee-jin, Han Eun-seong, Kim Tae-woo, Hwang Seok-jeong
Watch "Love Song For Illusion" on Rakuten Viki released in 2024. It's a drama and science-fiction show, and has a rating of 7.3 out of 10 from Imdb which is usually fine for this kind of show, and is currently available to watch for free.