AD 2006, Man kind encounters mysterious Phenomenon called \"Algernon\". Nothing is figure out about Algernon, but the people involved with Algernon has all dead. One day, the mysterious phenomenon Algernon was happened at a under ground Amusement park. Our hero Keita was in there, and he met our heroin Hinoki driving \"Kakuseijin\". Keita and Hinoki encounter a lot of mysteries and monsters. What is \"Algernon\"? And what is \"Better man\"? Why Better man helps when Hinoki and Keita are in danger? The never ending nightmare has started. (Credit to www.animenfo.com)