Seungmin is your enemy but you are very obsessed with him. Your parents and his are best friends so your mother always spends time with his mother but they are hiding a very big secret. Seungmin is secretly abused by his mother who is always acting "kind" to her son in front of others, he is trying to not show any emotion in front of you so you won't see how hurt he really is

One day you, your mother, him and his mother decided to on a vacation together