Yuichiro and Mikaela Hyakuya are haunted by their past: the same long nightmare every night, wishing everything could be over. They battle through fear and love to find one thing they both need: Hope. But Mikaela is a Vampire, hated by all humans except for Yuu and his acqaintances, so will they ever be able to be granted with that one wish they have both seeked their entire lives? Or will it end in disaster again? ~ I will try to update as much as possible ~

One day, a mysterious virus appeared on Earth which killed every infected human over the age of 13. At the same time, vampires emerged from the world's dark recesses and enslaved mankind. After escaping one of the Vampire Concentration Camps, Yuuichirou Hyakuya joins the Vampire Assassination Elite Unit(VAEU), a mercenary team where specialized soldiers are assigned to kill vampires who are becoming a potential threat to the Moon Demon Army. After being promoted to Corporal Sergeant, Yuuichirou is given a special assignment-to assassinate Mikaela Hyakuya, an old childhood friend in which he doesn't remember.