Smooth story, every chapter is exciting, I don't even think there is any filler. I don't know how realistic the "lessons" are, but from my limited experience they seem actually useful.
Amazing art. The character expressions are outstanding, even if a bit over-the-top. ("manga" literally means "exaggerated drawing", isn't it?)
The characters are well drawn, well written. The main characters developed naturally but some sub characters are ... somewhat forgotten. This manhwa could go on for at least 30 more chapters if the author expanded on the other characters beside the main couple. They have their own story but sadly was never touched.
My enjoyment would be 10/10 if there were more "ecchi" scenes between the main couple, but otherwise I enjoyed this.
Totally worth reading no matter who you are, it's a short and sweet love story at its core.