A human who takes a one-way trip to the Moon. By the time he was born, the Gregorian calendar has already been lost. He was born in the reconstructed 12th Protective City; a cultural garden that manages 10,000 population alive. He had been born into the world in the hopes of fulfilling the hope of humanity. He was part of the designer babies project that was suppose to genetically modify the babies into specially gifted children, however there were no successfully cases because they die upon birth. The scientist decided to change the test, they decided to alter a human heart that couldn't be stopped by human consciousness. Chikyuu no Otoko was a successful case but he was born with hearing loss and lacked emotional sensitivity. (Source: TYPE-MOON Wikia)