In both dramas, one or both of the leads time travel within a limited period of time, trying to change events in the present/near future that they don't have the full picture of. The ML's personality changes from what it is initially (from cheerful to withdrawn/somber in MDD and from selfish to self-sacrificing in TWY), and both FLs are sunshine personalities who bring light to the ML's life. Both couples have very good chemistry.
Both dramas are a combination of the mystery, fantasy, and romance genres and involve a serial killer/kidnapper and the leads having a shared past experience together. Both couples end up living together when the FL is targeted so the ML can protect her and both MLs have a special ability relating to their senses (enhanced vision vs. hearing thoughts). Jin Han plays the ML in both dramas.
