Manawa Kiyabu has recently moved to Cross Academy with her two best friends Niamh Suzuki and Bess Kiyabu and she's ready to start a new life, hoping to forget her bloody past that haunts her in her dreams. Will she ever live the peaceful life she wishes for? Or will her past catch up to her and swallow her whole? Meanwhile Zero Kiryu is forming blood lusts towards the new student. Will Zero realize his true feelings for Manawa? or will he devour her before he even get's a chance? Is Manawa the one he's been waiting for this whole time? Or is she just his Lethal drug?