The story unfolds against the backdrop of an epidemic in Chiba. Mizukami Riri (Sakurada Hiyori) returns home after finishing her softball club activities. Although she escapes to a shelter with the members of the softball club, new infected people keep appearing. She finally escapes after much hardship. What appears before her is a shopping mall in Makuhari, where young men and women of different ages and professions stick to it and live a positive and "special" life. Going out is a hell full of zombies, but the shopping mall is a safe zone with an excess of supplies. In this extreme situation, the idea of "the more this happens, the more I want to fall in love!" is born, and the various human states are intertwined with each other. After all, who will get married and escape together?