"Crahs landing on you" and "Descendants of the sun" have both military main male leads, and they are both, a romantic comedy. They have an AMAZING second lead couple and are just two perfect romantic kdramas to watch.

"Hi bye, mama" is about a loss, a mother losing her child. Not for the fact that she can't touch, or she can't be with her child, but for the fact that for your child, you are not her mother anymore. The fact that you gave birth to her, doesn't change the fact of your absence in your child's life, and "Lie after lie" portrays exactly that. That your absence, even if it's not your fault, changes evrything.