I wouldn't call this forbidden romance, cheating story, or anything of that sort. The long-relationship, the female lead was in, was over, before she even began anything with Jiho. Most of the male characters and their behavior and actions fueled me with rage. While I would like to believe the situation is this dire only in S. Korea, I know that many men live by these principles all over the world. Also, I wouldn't label this as noona romance, she is only 5 years older than him.

+realistic portrayal of long-term relationship or relationship with a person you have nothing in common
+realistic portrayal of male-driven society, esp. in conservative countries like S. Korea
+natural skinship, kisses (due to it being on Netlflix maybe?)
+strong sisters' bond
+Jung Hae In and his puppy eyes

-most of the male characters will stir up hate inside you
-1 song used repetitively, while it's a nice song and I did not mind that much, for some it could be annoying
-some people might not enjoy the slower pace
-occasional weird fashion choices