After the sudden vanish of the demons, the Diamond Region, one of the three region where humanity exists, became confident that the demon will never come back again. Not until when one night, the Flower City was attacked by the demons. Because of that, the father of Kane has been killed, and her mother was held capture by the demons. That happening urged him to join the Demon Hunters Squad, and discovered that he is holding a special ability that can save her mother, as well as protecting the humanity.
Valerie noticed group of men which happened to be the reason behind the daily trouble within their city. Days passed by, she began to grow curios about these men that dragged her into following them and soon, discovered something strange. She discovered that they weren't ordinary humans like them. Bringing here to the new world she never thought it exists.