Writhe, Adam-kun

"Why are you getting aroused...? That's not fair." In a world where the entire human population has been affected by the lingering effects of a pandemic and developed erectile dysfunction, high school student Kazuki is the only one who can still get an erection. If his secret is discovered, he could be condemned to a life as a guinea pig... he doesn't want that! He transfers to a new school in order to protect his secret, only to find out that it's an all-girls harem academy!? Even the kind and diligent student council president, Himeko, changes her attitude towards Kazuki once she realizes he can still get aroused – "If you feel sorry for me... then do it with me?" Himeko becomes excited, her breath growing rough, slowly undressing and intertwining their tongues... This is the story of Adam, the only man pursued by the unfulfilled desires of 4 billion Eve's.