This is one of those dramas with more potential the longer the series is.
Very cute and emotional concept containing most of kdrama favorite cliches: illness, childhood trauma, shared past, destined love, school bullying....
Well executed for the length and you will be left satisfied with how everything is panned but I cant help but think the potential this script has. Maybe in the future they will actually make it a normal 16 episodes length drama.
The romance is well pace and is well explained with flashbacks of the past but I couldn't feel chemistry, maybe due to the length of this series, with only 4 episodes, had loads to tell but little time to do so.
The kids acting here are quite good and they make you smile.
I still enjoyed it and because its so short you can watch it in one sitting.