Min Ga-yoon. 26 years old. Professional police officer. Captain of Violent Crimes Unit 2. Producer Min Yoon-gi's younger sister.His personality is similar to Min Yoongi's, so he's secretly a tsundere. However, when he drinks alcohol, his aegyo comes out smoothly.
Min Yoongi. 28 years old. World-renowned producer. Jung Ho-seok's older brother. Secretly a tsundere. He takes care of Min Ga-yoon a lot. However, he pretends not to like her.
Jung Ho-seok. 35 years old. World-renowned choreographer. Min Yoon-gi's younger brother. (Later, Min Ga-yoon's boyfriend). He's usually very cute and flirty.