Character Relationship Map: One Day

Characters

• Kang-soo (played by Kim Nam-gil) — protagonist
• Mi-so (played by Chun Woo-hee) — supporting
• Mi-so's Mother (played by Jung Sun-kyung) — supporting
• Choi Doo-yong (played by Yoon Je-moon) — supporting
• Ho-jung (played by Park Hee-von) — supporting
• Seon-hwa (played by Im Hwa-young) — supporting
• Seon-hwa's mother (played by Kim Hye-ok) — supporting
• Studio Complex Keeper (played by Lee Ru-ahn) — supporting
• Head Nurse (uncredited) (played by Lee Seung-yeon) — supporting
• Assistant Manager Cha (played by Kim Jung-hyun) — supporting
• Choi Ji-ho (played by Kim Ye-joon) — supporting
• Mi-so's caregiver (played by Kang Sook) — minor