When unpopular high schooler Issei Hyoudou ilas a less than romantic encounter with his first-ever girlfriend, the consequences are fatal! As he lies dying, who should come to his rescue but the prettiest girl in school, Rias Gremory! And the shocking truth she shares leaves Issei reeling... 'You've been reborn a devil. Now you work for me!' Issei's uproarious life as a devil's minion begins here!
Years ago, Asia healed the wounds of a demon by using her Sacred Gear. When the Church learned of it, she was excommunicated from the organization that had been her entire world. Now, that same demon, Diodora, has returned, hoping to marry Asia. Only defeat in a Rating Game can stop him, but could there be more to the gentle-looking demon Asia rescued from death than first believed?
夏っ! 訪れた冥界の地でグレモリーVSシトリーのレーティングゲーム対決構想が急浮上! 猛特訓を開始したイッセーたちだが、何やら小猫ちゃんの様子がおかしいようで…。学園ラブコメバトルファンタジー新展開!
憧れのリアス部長も同棲開始で、ビバ桃色ライフ! と思いきや、朱乃さんから衝撃提案がッ&教会側からの美しき刺客が登場。聖剣を巡る因縁の戦いに、どうするイッセー!? 学園ラブコメバトルファンタジー妄走!!
大天使・魔王・堕天使が勢揃いした<三すくみトップ会談>だが、和平を模索する会議を狙って謎の勢力が襲撃を…!? 後輩・ギャスパーの力を利用しようとする卑劣な連中に、イッセー、怒りの拳を叩き込めっっっ!