It's That Reincarnated-as-a-Virus Story, Volume 1 by Pirota | Goodreads

(often abbreviated as Zombie Sex & Virus Reincarnation ) is the concluding chapter of a niche adult visual novel and interactive media series known for its dark, post-apocalyptic themes and extreme survival scenarios. Developed under the Kan brand (specifically Kan S.P.A or related circles), the title has gained a cult following for its unique blend of biological horror, supernatural rebirth mechanics, and high-stakes eroticism.

In the final volume, the story reaches its emotional and biological climax:

>