High School DxD Series by Ichiei Ishibumi, Miyama-Zero, 石踏 一榮

I'm going to make this school my harem!When a cute girl asks Issei out, he believes his twisted fantasies are finally coming true. Too bad the girl sprouts a pair of black wings and stabs him with a spear on their first date! Saved by his school's number one beauty, Rias Gremory, Issei is transformed into a demon and made her servant... moreI'm going to make this school my harem!When a cute girl asks Issei out, he believes his twisted fantasies are finally coming true. Too bad the girl sprouts a pair of black wings and stabs him with a spear on their first date! Saved by his school's number one beauty, Rias Gremory, Issei is transformed into a demon and made her servant. Issei hopes to rise through the ranks of demonkind to grow powerful enough to create his harem, but in a city with fallen angels and insane priests, he'll be lucky if he can live long enough to do it! less

The Knight Seeks RevengeWith a sports festival on the horizon, the Occult Research Club expects smooth sailing after all the recent trouble. Everyone seems happy enough-except for Kiba, that is. The pretty boy hasn't been himself since he saw an old picture of Issei. Things only get worse when two new beauties arrive in town with powerful Holy Swords called Excaliburs. It seems Kiba has some history with the deadly weapons, having long ago sworn vengeance against them... moreThe Knight Seeks RevengeWith a sports festival on the horizon, the Occult Research Club expects smooth sailing after all the recent trouble. Everyone seems happy enough-except for Kiba, that is. The pretty boy hasn't been himself since he saw an old picture of Issei. Things only get worse when two new beauties arrive in town with powerful Holy Swords called Excaliburs. It seems Kiba has some history with the deadly weapons, having long ago sworn vengeance against them. Issei promises to help his friend, but do the demons really stand a chance against such legendary power? less

Guess what? I, Issei Hyoudou, am now a mentor to a new junior in the Occult Research Club! Yeah! Demon Lord Sirzechs had the Prez add a Bishop to her Familia. Wait...He’s a what? He was sealed where? Huh? The Demons, Angels, and Fallen Angels are having a meeting...here?! Well, no one ever said high school was going to be easy!

"Care to fool around with me?"Will Akeno-san's bombshell lead to a deadly lovers' quarrel?!Issei's just started cohabiting with his beloved President Rias, so he's all "viva sexy time!" But Akeno-san has other plans when she blows his mind with a shocking proposal! Then a pair of beautiful assassins from the Church make their entrance-what will Issei do when faced with the battle over the fate of the holy swords?!

ASIA’S GETTING MARRIED?!​Long ago, Asia used her Sacred Gear to save the life of a demon, a benevolent act that resulted in her being ousted from the Church. Now that demon, Diodora Astaroth, is back and hoping to wed Asia. She refuses, but the seemingly friendly man is persistent. As the Gremory Familia’s next Rating Game opponent, he wagers that if he wins, Asia will be his bride... moreASIA’S GETTING MARRIED?!​Long ago, Asia used her Sacred Gear to save the life of a demon, a benevolent act that resulted in her being ousted from the Church. Now that demon, Diodora Astaroth, is back and hoping to wed Asia. She refuses, but the seemingly friendly man is persistent. As the Gremory Familia’s next Rating Game opponent, he wagers that if he wins, Asia will be his bride. Naturally, Issei’s not about to let some pretty boy snatch up the blond beauty in his life, but Diodora’s machinations may prove more sinister and cunning than initially suspected. Returning home with Asia could require drastic measures... less

After a perilous start to the semester, peace is finally returning to Kuou Academy. At least, until Odin, a god from the Norse pantheon, shows up. Dealing with the lecherous old man is tough enough on its own, but a sinister group is also plotting to kill him. Issei and his friends will have to pull out every trick they can manage to make it out of this one!