ary ▁is ▁a ▁ 2 0 1 3 ▁super natural ▁Japanese ▁an ime ▁series ▁based ▁on ▁the ▁light ▁nov els ▁written ▁by ▁Nag om u ▁Tor ii ▁and ▁illustrated ▁by ▁Ch ise ▁Kam oi . ▁One ▁day ▁high - school ▁student ▁A kih ito ▁Kan bara ▁instinct ively ▁goes ▁to ▁save ▁his ▁fellow ▁school mate , ▁Mira i ▁K uri y ama ▁who ▁he ▁thinks ▁is ▁comm itting ▁suic ide . ▁However ▁Mira i ▁st abs ▁A kih ito ▁with ▁a ▁sword ▁made ▁of ▁her ▁own ▁blood ▁and ▁disco vers ▁that ▁A kih ito ▁is ▁an ▁imm ort al ▁" half - you mu " — the ▁off spring ▁of ▁a ▁super natural ▁creature ▁called ▁a ▁you mu ▁and ▁a ▁human . ▁After ▁learning ▁that ▁Mira i ▁is ▁a ▁Spirit ▁World ▁War rior ▁and ▁la cks ▁the ▁confidence ▁to ▁sl ay ▁you mu , ▁the ▁two ▁form ▁an ▁unlikely ▁pair ▁when ▁A kih ito ▁dec ides ▁to ▁help ▁her ▁reg ain ▁her ▁confidence ▁to ▁kill ▁you mu ▁so ▁that ▁she ▁may ▁stop ▁attempting ▁to ▁kill ▁him ▁as ▁practice . ▁ ▁The ▁twelve ▁episode ▁an ime ▁was ▁produced ▁by ▁Ky oto ▁An imation , ▁directed ▁by ▁Ta ichi ▁I sh id ate ▁and ▁written ▁by ▁J uk ki ▁Han ada , ▁with ▁character ▁designs ▁by ▁Mik u ▁K adow aki , ▁art ▁direction ▁by ▁Mik iko ▁Wat an abe , ▁sound ▁direction ▁by ▁Y ota ▁T sur u oka ▁and ▁sound track ▁music ▁by ▁H ik aru ▁Nan ase . ▁The ▁series ▁premier ed