Character Relationship Map: Head

Characters

• Hong-joo (played by Park Ye-jin) — protagonist
• Baek-jung (played by Baek Yoon-sik) — supporting
• Hong-je (played by Ryu Deok-hwan) — supporting
• Professor Kim Sang-chul / Professor Oh Byung-seok (played by Oh Dal-su) — supporting
• Kang Seung-wan (played by Danny Ahn) — supporting
• Yong-yi (played by Park Young-seo) — supporting
• Mr. Park (played by Woo Hyeon) — supporting
• Teaching Assistant Lim Hee-cheol (played by Choi Jae-sup) — supporting
• Detetctive Kim (played by Baek Jae-ho) — supporting
• Detective Park (played by Jang Joon-nyeong-I) — supporting
• Senior Jeong (played by Kwak Do-won) — supporting
• Baek-jung's wife (played by Jang So-yeon) — minor