Blood Type: Blue

Original title: ブルークリスマス

“The terror of witnessing the UFO! Damned as outcasts with blue blood!”

UFOs appear on Earth, and people who actually see them suddenly find that their blood has turned blue. Soon panic and hysteria result in the new "blue-bloods" being persecuted by the rest of mankind, and eventually certain all-too-familiar measures begin to be taken against them.