Protester; a role protesting at the very front of a group of protesters

Yi Sun-sin's soldier 2

Friend; comforts and helps the lead character's friend beside them in their sadness

Pureun; the school's top fighter who teaches a street thug a lesson after the thug picks a fight with him for bullying only the weak

Kim Il-je; a boxing-focused BJ Kim Il-je who engages in heated debates about exercise with other fitness BJs

Kang Hyeong-gyu; discovers a workbook about his life at a bookstore by chance, becomes absorbed in it, and gradually falls apart mentally while trying to live an easy life

Kang Hyeong-gyu; after losing everything to cryptocurrency in 'The Answer Sheet for Life,' he regains his senses and finds his dream, later appearing as the female BJ's future husband in the 'Adult' episode — cameo

Scholarship student; a situation in which the Empress serves tea to scholarship students

Junior hotel employee; tells a reporter trying to pry into the lead actor's private life that they cannot behave that way

Friend; explains who an unfamiliar friend crying at a funeral is

Tattooed man; is beaten by Ra Mi-ran after she mistakenly thinks her daughter is getting a tattoo at the tattoo shop

Chairman's wheelchair attendant; pushes and assists the chairman in his wheelchair

Security guard; explains the situation while showing CCTV footage

Groom; a man getting married in a village where people live in hiding during the Joseon era, when marriage was forbidden

Bartender; a colleague of a woman who died mysteriously, who explains the woman to the police investigating the case