Ambivalent ~Doutei wo Sutetara Shinu Sekai~

In a world ravaged by a strange new sexually transmitted disease, women experience a drastic increase in libido—dozens of times stronger than normal—while nearly all infected men perish. Casual sex now equals certain death. Sadao Shindo, a man with no prior sexual experience, swears to remain celibate until a cure is found. But as the relentless advances of desperate women surround him, his resolve is pushed to the breaking point…