My Wife is an Immortal Black Snake

Through a dating app, a 30-year-old single transmigrator found a future wife he liked. Although his wife sometimes seemed gloomy and often said things that were hard to understand, she cared about him a lot, and their married life was very fulfilling. Aside from her occasional efforts for that thing called "Ursus," there was nothing wrong with her. Until one day... "Um? Koschche, you..." "This is my new body, what's wrong?" Looking at his wife, who had a completely new body but whose personality remained gloomy and eccentric, Yang Hao swallowed hard, thinking that he had discovered a terrible secret.