▁all - f em ale ▁band ▁named ▁Girls ▁Dead ▁Mon ster ▁that ▁acts ▁as ▁a ▁di version ▁during ▁miss ions , ▁and ▁a ▁sub ter rane an ▁organization ▁called ▁the ▁Gu ild ▁that ▁mass - produ ces ▁weapons ▁and ▁supplies ▁them ▁to ▁the ▁S SS . ▁ ▁O ton ashi ▁is ▁asked ▁to ▁join ▁the ▁S SS ▁by ▁its ▁founder ▁and ▁leader ▁Y uri ▁Nak am ura . ▁The ▁S SS ▁fight ▁against ▁K ana de ▁T ach ib ana , ▁also ▁referred ▁to ▁as ▁Angel , ▁the ▁student ▁council ▁president ▁of ▁the ▁after life ▁school ▁whose ▁respons ib ilities ▁require ▁her ▁to ▁suppress ▁the ▁team ' s ▁dis rupt ive ▁activities . ▁Although ▁the ▁S SS ▁initially ▁views ▁K ana de ▁as ▁their ▁enemy , ▁O ton ashi ▁eventually ▁be fri ends ▁her ▁and ▁she ▁joins ▁the ▁S SS . ▁Following ▁this , ▁O ton ashi ▁begins ▁helping ▁the ▁other ▁S SS ▁members ▁overcome ▁any ▁reg rets ▁they ▁had ▁in ▁life ▁so ▁they ▁can ▁move ▁on . ▁In ▁the ▁process , ▁O ton ashi ▁grows ▁closer ▁to ▁the ▁other ▁characters ▁as ▁he ▁lear ns ▁more ▁about ▁them . ▁Although ▁the ▁story ▁contains ▁rom antic ▁plot ▁lines ▁between ▁O ton ashi ▁and ▁each ▁of ▁the ▁hero ines , ▁the ▁past s ▁and ▁conflicts ▁of ▁the ▁characters ▁are ▁not ▁meant ▁to ▁simply ▁en l iven ▁the ▁rom antic ▁elements , ▁but ▁also ▁provide ▁a ▁significance ▁that ▁goes ▁beyond ▁rom ance . ▁ ▁Development ▁and ▁release ▁Following ▁the ▁conclusion ▁of ▁the ▁Angel ▁Be ats !