Both Flight to You & Library Wars have similar instructor - trainee dynamic between the male lead & the female lead. Both FLs have strong sense of justice & have moms who are against their choices of careers.

- Kind-hearted, highly capable wife works together with her husband's mistress in textile business and in taking care of the family after the husband went missing.
- The wife is also childless and has a hand in raising the mistress' child.

YAMH 2nd pairing's background is pretty similar to SK's main couple.
The romance game in SK isn't as strong as YAMH though since SK is more on personal growth.

The dynamic of the main couple is pretty much the same.
ML saved FL during their younger days.
FL idolized ML but couldn't remember his face.
ML became FL's drill instructor.
Both are about protecting what dear to them (the people & the library)

Both Kidnapping Game & g@me are adapted from the same novel by Keigo Higashino, The Name of the Game is a Kidnapping