Characters played by Chaerin Park
Nam Yu Ri
Characters played by Ji-Hoon Park
Gong Joo-young
Characters played by Younghoon
Lee Kyung-woo
Characters played by Seo Hoo Baek
Classmate
Characters played by Hyun Joong Oh
Library sister's senior
Characters played by Ruby Lee
Wang Ja Rim
Characters played by Dayoung
Oh Ah Ram
Characters played by Kim Sugyeom
Nam Goong Ji Soo
Characters played by Ahn Do-Gyoo
Ahn Kyung Min
Characters played by Dong-Hyun Kim
Dok Go Moon
Characters played by Joong-don Kim
Jo Yeon Sa
Characters played by da-Eun Jung
Yang Min Ji
Characters played by Nam Kyu-Hee
Bang Ye Seul
Characters played by Kwak Hee-Joo
Jung Sang Hoon
Characters played by Kim Seunghee
Hong Jin Hee
Characters played by Ko Chanbin
Kim Byung Hoon
Characters played by Lee Seo-Yeon
Wang Byeol Rim