It is revealed that Kohta Hirano, one of the students managed to escape the school but was eventually bitten and transformed. He has been roaming around the city and infecting other survivors. Saya and her family decide to take Takashi and Rei to a safe place away from the city.
Before leaving, Takashi decides to go back to the school to try and save as many people as he can. He reunites with his childhood friend Saeko Busujima, who has become a powerful and skilled zombie hunter. Together, they manage to save a few more students and teachers.
Meanwhile, the Japanese military has arrived and has set up a quarantine zone around the city. They are trying to contain the outbreak but are struggling due to the sheer number of infected.
Takashi, Rei, Saya, and her family manage to escape the city and reach a safe place in the countryside. They are reunited with other survivors and start to rebuild their lives.
The series ends with Takashi and Rei vowing to never forget the people they lost and to continue fighting for their survival.