It's Okay to Not Be Okay

Bae Bo-ram (Myoung Ji-Suk), Cho Si-yeon (Lee Seul-bi), Min Young (Lee Seul-bi's Mother), Kim Jin (Nurse), Son Kang-gook (Kim Seung-cheol), Kwon Ye-Eun (Go-eun), Kim Woo-kyum (Caregiver), Kim Tae-hoon (Doctor), Yoo Seung-il (Angry Professor), Lee Sun-Young (Nurse), Kim Sang-il (Admin Manager), Yu Mi-ran (Landlord)

Jung Seung-kil (Book Critic), Kim Geon-ho (Book Signing Parent), Lee Ji-hae (Book Signing Parent), Jo Yi-hyun (Dinosaur Boy), Park Chul-Min (TV Reporter), Kim Ju-hun (Lee Sang-in), Park Jin-joo (Yoo Seung-jae), Moon Woo-jin (Young Moon Gang-tae), Lee Kyu-sung (Young Moon Sang-tae), Choi Hee-jin (Kang-tae & Sang-tae's Mother), Jung Ji-hwan (Publishing Staff), Jung Ji-hyeon (Publishing Staff)

Kwak Dong-yeon (Kwon Ki-do), Lee Young-sook (Kwon Man-su's Wife), Han Gi-joong (Kwon Man-su), Kang Woo-je (Kwon Man-su's Assistant), Bae Yu-ri (Man-su's Daughter), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Lee Eol (Ko Dae-hwan), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Kim Chang-wan (Oh Ji-wang)

Kwak Dong-yeon (Kwon Ki-do), Bae Hae-seon (Kang Eun-ja), Lee Young-sook (Kwon Man-su's Wife), Han Gi-joong (Kwon Man-su), Kang Woo-je (Kwon Man-su's Assistant), Bae Yu-ri (Man-su's Daughter), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Kang Ki-doong (Jo Jae-soo), Moon Woo-jin (Young Moon Gang-tae), Lee Kyu-sung (Young Moon Sang-tae)

Jung Sang-hoon (Motel Clerk), Bae Hae-seon (Kang Eun-ja), Park Seo-kyung (Child Nam Joo-ri), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Jung Ji-hwan (Publishing Staff), Jung Ji-hyeon (Publishing Staff), Ko Han-min (Publishing Staff), Ryu Yeon-seok (Publishing Staff), Cheon So-Ra (Publishing Staff)

Bae Hae-seon (Kang Eun-ja), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Lee Eol (Ko Dae-hwan), Kim Su-in (Young Ko Moon-young), Park Jin-joo (Yoo Seung-jae), Moon Woo-jin (Young Moon Gang-tae), Lee Kyu-sung (Young Moon Sang-tae), Kim Chang-wan (Oh Ji-wang), Kim Ki-cheon (Kan Pil-wong), Choi Woo-sung (Oh Cha-yong)

Bae Hae-seon (Kang Eun-ja), Kwon Ha-young (Kang Eun-ja's Daughter), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Moon Woo-jin (Young Moon Gang-tae), Lee Kyu-sung (Young Moon Sang-tae), Choi Hee-jin (Kang-tae & Sang-tae's Mother), Kim Chang-wan (Oh Ji-wang), Kim Ki-cheon (Kan Pil-wong)

Choi Daniel (CEO Choi Daniel), Kwon Ha-young (Kang Eun-ja's Daughter), Kwon Dong-ho (Lee Ah-reum's Ex-husband), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Lee Eol (Ko Dae-hwan), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Kim Chang-wan (Oh Ji-wang), Kim Ki-cheon (Kan Pil-wong), Choi Woo-sung (Oh Cha-yong)

Park Seo-kyung (Child Nam Joo-ri), Lee Hwa-young (Lee Ah-reum's Mother), Jeon Jun-woo (Lee Ah-reum's Brother), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Kim Chang-wan (Oh Ji-wang), Kim Ki-cheon (Kan Pil-wong), Kim Mi-kyeong (Kang Soon-duk), Jeong Jae-kwang (Joo Jung-tae), Chi Hae-won (Lee A-reum)

Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Lee Eol (Ko Dae-hwan), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Kim Chang-wan (Oh Ji-wang), Choi Woo-sung (Oh Cha-yong), Kim Mi-kyeong (Kang Soon-duk), Kang Ji-eun (Park Ok-ran), Seo Joon (Kwon Min-seok)

Kim Yun-seul (Kindergarten Girl), Choi Se-in (Kindergarten Girl), Kim Ju-hun (Lee Sang-in), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Kim Chang-wan (Oh Ji-wang), Kang Ji-eun (Park Ok-ran), Joo In-young (Yoo Sun-hae)

Woo Jeong-won (Do Hee-jae), Kim Ju-hun (Lee Sang-in), Lee Eol (Ko Dae-hwan), Kang Ki-doong (Jo Jae-soo), Lee Kyu-sung (Young Moon Sang-tae), Choi Hee-jin (Kang-tae & Sang-tae's Mother), Kim Chang-wan (Oh Ji-wang), Kim Ki-cheon (Kan Pil-wong), Kim Mi-kyeong (Kang Soon-duk), Jeong Jae-kwang (Joo Jung-tae)

Woo Jeong-won (Do Hee-jae), Min Kyung-jin (Yoo Sun-hae's Father), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Lee Eol (Ko Dae-hwan), Kim Su-in (Young Ko Moon-young), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Kim Chang-wan (Oh Ji-wang), Kim Ki-cheon (Kan Pil-wong), Choi Woo-sung (Oh Cha-yong)

Woo Jeong-won (Do Hee-jae), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Lee Eol (Ko Dae-hwan), Kim Su-in (Young Ko Moon-young), Kim Chang-wan (Oh Ji-wang), Kim Mi-kyeong (Kang Soon-duk)

Bae Seong-il (Detective), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Kim Su-in (Young Ko Moon-young), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Choi Hee-jin (Kang-tae & Sang-tae's Mother), Kim Chang-wan (Oh Ji-wang), Kim Mi-kyeong (Kang Soon-duk)

Kwak Dong-yeon (Kwon Ki-do), Bae Hae-seon (Kang Eun-ja), Kim Ju-hun (Lee Sang-in), Jang Young-nam (Park Haeng-ja), Jang Gyu-ri (Sun-byeol), Kang Ki-doong (Jo Jae-soo), Park Jin-joo (Yoo Seung-jae), Lee Kyu-sung (Young Moon Sang-tae), Kim Chang-wan (Oh Ji-wang), Seo Joon (Kwon Min-seok)