eltkda

in Ep4 Translation mistake in subtitle
blood type test that means
in EP7 They see Han Tea Joo but not Yoon Na Young

Mental Lab Theory
1. Subconscious of the main character focus on solve the murder case while he is in coma.
2. The main character wakes up and solves the murder case
3. The experience of the unconscious world is so sweet that the main character can not accept reality and commit suicide.

I think it's not time travel

it's like that Ha Jung Woo and Kyungho made this film for Sooyoung :)!!!