. ▁S ana ▁is ▁not ▁actually ▁blood ▁related ▁to ▁Har uki . ▁ ▁H iro ki ' s ▁out going ▁child hood ▁friend . ▁A oi ▁is ▁very ▁popular ▁at ▁school , ▁due ▁to ▁her ▁looks ▁and ▁person ality . ▁She ▁tries ▁to ▁be ▁helpful ▁to ▁Har uki , ▁by ▁giving ▁him ▁luck y ▁char ms ▁in ▁order ▁to ▁try ▁to ▁get ▁rid ▁of ▁the ▁bad ▁luck . ▁She ▁is ▁Wat aru ' s ▁younger ▁sister . ▁ ▁Media ▁ ▁Print ed ▁media ▁A ▁m anga ▁adaptation ▁was ▁serial ized ▁in ▁the ▁Den ge ki ▁G ' s ▁Festival ! ▁Com ic ▁magazine ▁between ▁April ▁ 2 0 0 9 ▁and ▁October ▁ 2 0 1 1 ▁issues . ▁Two ▁tank ō bon ▁volumes ▁were ▁published ▁in ▁Japan ▁by ▁ASCII ▁Media ▁Works , ▁under ▁their ▁Den ge ki ▁Comics ▁im print . ▁The ▁m anga ▁was ▁illustrated ▁by ▁A ya ▁Yam ab uki . ▁ ▁A ▁light ▁novel ▁called ▁ ▁was ▁published ▁by ▁Har vest ▁under ▁their ▁Nag omi ▁Bun ko ▁im print ▁on ▁January ▁ 1 , ▁ 2 0 1 0 . ▁It ▁was ▁written ▁by ▁I to i ▁Ken ' ichi , ▁and ▁illustrated ▁by ▁artist ▁S ator u ▁Ari ka wa , ▁the ▁cover ▁was ▁illustrated ▁by ▁Mur ir in . ▁ ▁Web ▁radio ▁and ▁character ▁CD s ▁A ▁web ▁radio ▁directed ▁by ▁N iji , ▁called ▁ ▁was ▁hosted ▁on ▁radio ▁station ▁On sen . ▁The ▁show ▁broadcast ▁from ▁January ▁ 6 , ▁ 2 0 0 9