Plays the role of Manager Kim. In the drama, he is Kim Min-ji's father. He is a skilled fighter in the show and takes good care of Guest. In reality, he is close friends with Choi Dae-hoon and Yoon Kyung-ho. 50 years old.

Plays the role of Seong Han-su. In the drama, he is a national Taekwondo athlete. He is Seong Tae-hun's father in the show. He calls So Ji-sub 'Hyung'. He is close with Yoon Kyung-ho and So Ji-sub. He takes good care of Sumin, who plays Kim Min-ji. 46 years old.

Plays the role of Park Jin-cheol. In the drama, he is Park Da-bin's father. He calls So Ji-sub 'Hyung' and is the same age and close friends with Choi Dae-hoon. He takes good care of Sumin, who plays Kim Min-ji.

Plays the role of Seong Tae-hun. In the drama, he is Seong Han-su's son. Actual age is 19. He takes good care of Sumin.

Plays the role of Park Da-bin. She takes good care of the youngest, Sumin. In the drama, she is Park Jin-cheol's daughter. Actual age is 19 (estimated).

Plays the role of Joo Kang-chan. In the drama, he is the Chairman of Juhak Construction. He is Joo Hye-ri's father in the show. He takes good care of Sumin.

Plays the role of Joo Hye-ri. She takes good care of Sumin. In the drama, she is Joo Kang-chan's daughter.

Plays the role of Kang Guk-cheol. He takes good care of Sumin. In the drama, he is the Director of the Special Task Force.

Plays the role of Jeong Sang-ah. In the drama, she is a Special Task Force agent. She takes good care of Sumin.

Plays the role of Mr. Lim from the laundry shop. In the drama, he is the owner of a laundry shop and a Special Task Force agent. He takes good care of Sumin.