Kanja S no Kyuusai

Sota Sasaki is one of several unfortunate men afflicted with the lethal "candle disease", a case of progressive cell degeneration that typically kills within 5 years. Yet it turns out that Sota harbors what might be a miraculous cure for the disease in his bodily fluids! The diligent doctor thus offers Sota a deal - if he agrees to provide his semen and participate in the research to develop a cure, then he'll be given special privileges within the hospital ward.

Will Sota inject the other male patients with his cure for the sake of science and finding his own miracle treatment? Will he abuse the privileges granted to him in return?