Ambivalent ~Doutei wo Sutetara Shinu Sekai~

A new type of sexually transmitted infection is spreading around the world. When infected, women's sexual desire increases by several dozen times, while 99% of men die. In a world where casual sex means death, Shindo Sadao, who is a virgin, vows not to have relations with anyone until a vaccine is developed, but the temptations of women overwhelm him!