Lee Cheong-san: He is one of the main protagonists, a student who becomes a leader figure as he tries to protect his classmates and survive the outbreak. Nam On-jo: Another main character, she is a resourceful and brave student who plays a crucial role in the group's survival. Cheon Ji-min: A popular and kind-hearted student who faces challenges and dangers during the outbreak. Yoon Gwi-nam: He is portrayed as a tough and determined character who also becomes a key figure in the group dynamics. Lee Su-hyeok: A former student of the high school who returns during the outbreak and becomes involved in the survival efforts. Lee Hyeong-seok: He is a student who initially tries to survive on his own but eventually joins forces with others to increase his chances of survival. Song Hwi: A student who shows courage and resilience in the face of danger. Park Jung-jae: Known for his bravery and determination, he becomes a key player in the group's efforts to overcome obstacles. Lee Ji-eun: She is a student with a strong will to survive and protect her friends, contributing to the group's resilience. were all trying to live in the zombie outbreak.