At the start, it drops you right in the vacation trying to show who can be trusted and who can't giving us free lessons on life through Yo ha who I believe is a complex character from his unfortunate childhood.
Go ra is my favourite whose innocence gets warped and twisted with his personality changing from meek and quiet to the one who is planning the elaborate schemes. Everyone uses him for their own purposes even the close friends who have so much memory
The detective is the one friend we all need in life who is independent and wants justice but cares about their close friendship
The middle part from ep 6 was boring with nothing happening and only stayed with it for the actor's sake. I cried with the amount of people who died either by covering up or couldn't continue with life.

This has illustrated don't trust anyone as you will be used like a toy