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. 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...

When unlucky high school letch Issei is murdered by his first-ever girlfriend on his first-ever date, who should jump to his rescue but the hottest girl in school, Rias-senpai! She informs Issei that he's been reincarnated as a demon and that it's about time he got to work-for her! Caught in the bosom of an age-old war between angels and demons, Issei soon discovers that being enslaved by a demonic beauty isn't quite all that it's cracked up to be!

A Rocky Reunion!As Issei and the others hone their skills for the battle ahead, the Hyoudou residence receives a surprise visit from…Rossweisse’s grandmother?! The wizened spell caster, Gondul, commands great respect from her young Valkyrie granddaughter, and Issei is caught unawares when she reveals that one reason for her visit is to meet Rossweisse’s boyfriend! Now who might she be referring to…? And just what is that unsettling aura that seems to cling to her?

Summer's here, and before anyone knows it, the rating game between the Gremory and Sitri houses is scheduled to take place in the devil realm! Issei and the gang jump right into some hellish training, but something's not right with Koneko-chan...?

Can this duo of devilish darlings really grant any wish?!The naturally clumsy Sister Asia and taciturn cutie Koneko form an unlikely pair as they head out to answer summons from humans with requests, but...can they really fulfill every desire?! These two little devil beauties get down to work in this spin-off of the megahit High School DxD!

Is love in the air between lowly servant Issei and his mistress, the bewitching Rias?! Reincarnated as a demon by Rias, the school beauty, Issei finds himself in servitude to his devilish mistress. But when Issei befriends Sister Asia, a nun from the Church, which is widely known to be hostile to demonkind, he's practically asking for a target on his back-as Rias is quick to inform him! Worse yet, when the good sister is kidnapped by a fallen angel, Issei rushes to her aid! But little does...

Finally, the spotlight shines on Yuuto Kiba. Just how did ne and Rias meet? How did he become a demon? The ban finally lifts on this forbidden episode, and Yuuto and Rias’s past is revealed!

"Hold me, Issei." ...Are you serious, President?! Issei Hyoudou, recently brought back to life as a devil, works hard every day in pursuit of his ultimate goal--to become the "Harem King"! Meanwhile, a handsome aristocrat, Riser Phoenix, makes his entrance, claiming to be engaged to President Rias... Her reaction, though, is a surprise to all!

SIBLING SHOWDOWN!Issei and the others enter the country of vampires and meet Gasper’s old friend Valerie…who now rules as the nation’s queen! But it’s clear that her older brother is the one pulling the strings behind the throne. Gasper vows to rescue her from her brother’s clutches and behead the puppet regime, but it might be too much for him to handle alone. Luckily, he knows a few devils willing to go head-to-head against vampire royalty!

A conference between devils, angels, and fallen angels?! Kuou Private Academy will never be the same!! Devil King Sirzechs pays a visit to the Hyoudou household, and he's got some astonishing info for Issei and the gang! Later, the beautiful swordswoman Xenovia too has a shock in store for Issei when she asks him a question that's been on her mind: "Will you have a child with me?"......Can she be serious?!

“RIAS GREMORY’S VIRGINITY BELONGS TO ME!”Issei is finally beginning to adapt to his new life as one of the beautiful Rias’s demonic servants. Just as things start looking up for the perverted high schooler, however, a cocky pretty boy named Riser arrives, claiming to be Rias’s fiancé! To save the prez from a marriage she doesn’t want, Issei and the other members of the Gremory Familia will have to battle Riser’s team. Even with the mighty Boosted Gear at his disposal, can Issei really win ...

"Would you like to have a fling with me?" Akeno-san drops a bombshell?! Issei has just started cohabiting with his beloved President Rias, so he's all "viva sexy time!" But will Akeno-san's proposition lead to a deadly lovers' quarrel?! And what will Issei do when faced with a battle over the holy swords?!