Kasuga Arata akararama hupenyu hwakajairika mutaundi diki, pamwe neshamwari yemwana uye hama yake, Hijiri Kasuga. Nekudaro, zvese zvakachinja pazuva reBlack Sun. Iyo Breakdown Phenomenon iyo yakaparadza guta kwaakatora Hijiri ndokugara yakave yakakonzerwa neBlack Sun. Sezvo Hijiri anotanga kubuda, iye anoturika grimoire pamutsipa wake, achikumbira kuti ichengetedze Kasuga. Pakurasikirwa nedzimwe shamwari dzake dzese pamwe nemhuri neHijiri vakashungurudzika, Kasuga anokumbira kuti nyika yake ive huru zvakare, izvo zvinoita kuti grimoire igadzirisezve hupenyu hwayo hwese, uye ichimuita kuti akanganwe kuparadzwa kweguta nekutsakatika kwaHijiri . Lilith Asami, mage, anotumirwa kuti aongorore matongo uye iye anowana iro simba rakasimba mukati mavo. Iye anoita kuti Kasuga arangarire zviitiko zvakasarudzika uye nekudaro huroyi hwakaputsika, kwete pasina grimoire kumuudza kuti Hijiri haana kufa. Kasuga anosarudza kuti imwe chete nzira yaachave yekuita magus iyeye saka Hijiri anogona kununurwa naye uye nekudaro anojoinha chikoro chakavanzika chemageji anotarisana nematambudziko emashiripiti pasirese, Royal Biblia Academy. Ikoko anoziviswa pamwe chete neUtatu Vanomwe, vakadzi vanomwe vane simba magege vari pamusoro peanodzidziswa (Lilith ari mumwe wavo) vanozomubatsira pachinangwa chake chekuva muroyi akasimba nekuwana chokwadi nezveHijiri pamwe Zuva Dema. Iye anokurumidza kuona kuti imwe yeTatu Utatu, Arin, anotaridzika kunge akafanana chaizvo nehama yake yakarasika kunyangwe ichiratidza hunhu hwakasiyana zvachose.
