- Green-flagged ML
- Teacher FL who is revenge-driven
- Republican era
- Steamy kisses & sizzling chemistry

- steamy kisses and sizzling chemistry
- republican era
- second chance romance
- green-flagged ML
- revenge theme
- FL is a secret agent working for an organisation

- steamy kiss
- republican era
- misunderstandings that leads to resentment, regarding the death of the leads' parents.

- steamy kisses
- republican era
- green-flagged ML
- FL's got some secret hidden from ML, which is her revenge mission.

Both take place during the Joseon era
Both MLs are crown prince and somehow have to be on the run outside the palace with FLs

- Snowy setting
- Coach ML
- FL rekindled ML's passion for his sport, which he abandoned years ago due to some reason.

- Historical drama with the same leads.
- Angst galore. Mostly from ML.
.................................................

Similarities:
- Do-over stories that initially stems from regrets.
- Angst and poignancy galore.
- ML's love is unrequited initially.
- 2ML is FL's first romantic choice, whom she decided to leave in the do-ever life after spending a significant amount of effort chasing after but failing miserably to avoid the repeat of tragedy in her previous life.
- No kiss.

Differences:
- FL in SoT reicarnated, while in SFOT the FL time-travel.
- Modern vs. historical settings.
- Endings.

Full-length drama with similar plot and characters.

Similarities:
- Simp ML with a hot bod and smouldering gaze
- Revenge-driven & mature FL
- Republican era
- Steamy kisses & explosive chemistry

- both couples are childhood sweethearts and their romance spans from high school to college to work.
- both features an upbeat FL and a cold ML who warms up to her over time.
- healthy main relationships.

- Both FLs are resourceful visionaries, planners, and medical experts.
- Revenge elements.
- Historical setting.

Similarities:
- Light-hearted rom-com.
- Historical era.
- Witty, cheerful, insightful, and glutonous FL who makes many contributions for the good of the people.
- Kind, patient, resourceful, and visionary ML.
- ML is a royal member who has health issue.