I have really enjoyed this show.
It talks about ones hurt and how it could implement everyone who loves that person to be severely sad.
The casting is pretty good except the new generation cast felt very "school theater/drama class" esc.
It's not even about overdoing it, all of them just were doing the bare minimum and that made that generation cast
look very weak. even though the cast that had the past tense relationship had more experience. most of their first works were easy to identify their characters in other dramas. easy meaning as in you can actually relate or feel that character.

what i didn't like:
honestly they should've kept it as the past relationship only. the newer didn't really do anything major. it was just a hit or miss with the newer kids. towards the last episodes their story was okay, they just made the drama look light when its supposed to be very melodramatic with it being sad. the drama would go to a hamin scene with a very sad topic and then it would go towards jaemin or either of the new kids, with a happy vibe. it just didn't fit.

What i didnt understand, it was kinda random that jaemins word made hamin kill himself. like what?????

however i really do enjoy watching this. but because the newer kids do get annoying, i dont think ill rewatch. hope seo ji hoon will have an actual main character. i know he has a new one coming soon but hes not the first main.. so i wish he gets one after that. ill be waiting.