I found “While You Were Sleeping” fascinating because of its unique blend of crime, legal drama, romance, and fantasy. The concept of dreaming future events and altering their outcomes is compelling. However, the execution leaves room for criticism. Nam Hong-Joo's initial inability to change her dreams' outcomes seems inconsistent when later, all three protagonists manage to prevent tragedies. It raises questions about the series' internal logic and the consistency of its supernatural rules. While the characters' development and interactions are engaging, the series sometimes relies too heavily on coincidence and contrivance to drive the plot forward.