Main characters:

Kang Haechan

-17 years old

-the only son in his family

-bestfriend with Taeyong, Yuta and Ten

Kim Hyoyeon

-27 years old

-has no family

-bestfriend with Jessica and Seohyun

Nakamoto Yuta

-17 years old

-japanese

-has one step-brother named Byun Baekhyun

Byun Baekhyun

-25 years old

-work as a private investigator

-hates Yuta

Jang Wooyoung

-27 years old

-Hyoyeon's ex fiance

-work as a lawyer