When a Sumatran rat-monkey bites Lionel Cosgrove's mother, she's transformed into a zombie and begins killing (and transforming) the entire town while Lionel races to keep things under control.
Tensei Kenja no Isekai Life: Dai-2 no Shokugyou wo Ete Sekai Saikyou ni Narimashita My Isekai Life: I Gained a Second Character Class and Became the Strongest Sage in the World (2022)