Ambivalent ~Doutei Wo Sutetara Shinu Sekai~

A new type of sexually transmitted disease spreads around the world. When infected, women's sexual desire increases by several dozen times, and 99% of men die. In a world where "casual sex = death." The protagonist, Sadao Shindo, who has no sexual experience, vows not to have relations with anyone until a vaccine is developed, but the temptations of women overwhelm him...! The sexy pandemic story begins!