Through Sang-woo's character, the series expertly portrays the devastating effects of trauma and the long-term psychological damage it can inflict. As the story unfolds, we witness Sang-woo's gradual descent into madness, which is both haunting and thought-provoking.
: Driven by an insatiable need to be close to his object of affection, Bum spends months cracking the keypad code to Sangwoo’s home.
Driven by his fixation, Bum eventually deciphers the passcode (54288) to Sangwoo's home and sneaks inside while Sangwoo is out.