Shim Chung-eon (played by Park Sang-myeon) is a protagonist in Just Do It!.
Jeong Jang-mi (played by Park Jin-hee) appears in Just Do It!.
Won Kwang-tae (played by Lee Beom-soo) appears in Just Do It!.
Jeong Dae-cheol (played by Jung Jun) appears in Just Do It!.
Won Jong-rim (played by Song Ok-suk) appears in Just Do It!.
Jeong, Byeong-hwan (played by Ahn Suk-hwan) appears in Just Do It!.
Officer (played by Yang Mal-bok) appears in Just Do It!.
