Zombie no Afureta Sekai de Ore dake ga Osowarenai  

In a World Filled with Zombies, Im the Only One They Wont Attack, ゾンビのあふれた世界で俺だけが襲われない, I'm the Only One They Won't Attack, I am the only one who is not attacked in the world filled with zombies.

Yuusuke is an introverted office worker who dislikes people and prefers to work alone in silence. When his company goes bankrupt, he loses his job and becomes a recluse. On one rare occasion, he ventures out of his apartment after a week-long video game marathon and is attacked by a mysterious man who bites his arm. Despite escaping back to his room, Yuusuke falls ill with a fever and remains bedridden for several days. When Yuusuke wakes up, he finds that the world has changed drastically. Zombies have appeared everywhere, and only a few human survivors remain hidden. However, Yuusuke discovers something peculiar - he is immune to the zombie's attacks. He must now take advantage of his new situation and uncover the reason behind his immunity while navigating through this post-apocalyptic world.