Both titles are about an older woman's interest and fascination with a high school aged boy. Both female leads really like the smell of the younger boy.

In these series, both male leads project a false persona around others. They only reveal true emotion through written correspondence with the female lead without the female lead knowing it is them. Both pairings also have a large age gap.

Both series have a main male lead who is morally upstanding in an increasingly corrupted work environment. Both of their bosses also dislike them and would like to see them fired.

Both titles blend modern day Korea with traditional Korean culture. They also both have the rich man/poor woman trope.

These titles are similar because there is a need for an heir and in that desperation it is requested that one takes the place of another (because there is an inability to conceive) to ensure that an heir is produced.

These movies are similar because in both a family moves to a rural town. The teenage boy becomes close with the outcast girl at his new school. There are rumors around the town about the girl and her father that leads people to mistreat them.

Both take place in convenience stores with weird characters and strange occurrences happening regularly.

Both dramas are stories of revenge. The series surrounds the fulfillment of revenge for a beloved person who died violently when the main characters were younger. The stories' conclusions are reminiscent of each other. Ikuta Toma also stars in both dramas.

These movies are similar because both have young men some how becoming the caretakers of a baby. The male-leads both struggle with their new found responsibilities as a father and also have romantic side-plots. Overall they both have a similar feel with the comedic elements and feel-good family vibe they share.