SPOILER ALERT: I would've given it a five star if it had a different ending.
Jun had a caring heart throughout each episode, then he changes. Why couldn't the writers show Ra-ra express a caring heart and have her be there for him while battling his cancer like he was there for her?
The town could've been there for him as well. Considering how different he was from his parents, this would've proved that difference.
He was private at first, but as the show went on, he opened up more. Instead, they have him come back five years later to chuckle when she's been heartbroken all that time and brush it off like her feelings didn't matter. She and the people of that little village were heartbroken, thinking he died only for him to return five years, FIVE YEARS later.