Hiya

Jin-Sang is a troublemaker in his family. He is suspected of fraud and murder, while Detective Choi is chasing after him. Jin-Sang has a younger brother Jin-Ho. He always tries to get close to his younger brother, but Jin-Ho hates him. Jin-Ho is a high school student and dreams of becoming a singer, but he keeps failing his auditions.

Park Hwa-young

Hwa-young is an 18-year-old student living alone. Her friends call her "mom" and use her house as their place to hang out, but don't really include her in their clique. Hwa-young pays particular attention to one of the friends, Mi-jeong.