Tetsuto Uesu: 14 books

Basara’s step-sister Naruse Mio possesses the power of a demon lord--a power that is growing stronger by the day, luring demons to Earth. Basara has forged a veritable harem at the Toujou household, living an ideal life together with Mio, the succubus Maria, his two heroic childhood friends, and...

Basara and the rest of the Toujo clan decide it’s time to beat the heat--at the beach! But when Basara and the gorgeous girls that call him master are involved, things are bound to become an entirely different kind of heated. Along with their new servant and houseguest, the reformed demon Zest, the whole crew enjoys some rest, relaxation--and more sensual diversions.

The enemy is finally making their move, seeking the Demon Lord’s power hidden within Mio’s body. But during the assault, a pinnacle moment of Basara’s past is revealed, and with it, a true glimpse of his mysterious power--the Banishing Shift! Is the combined strength of Mio and her protectors enough to triumph or have they already reached the limits of their familial bonds?

With hardly a moment’s rest since saving Mio from the White-Masked Demon, an even stronger enemy has appeared. As the timetable tightens on the new Demon Lord’s reign, he’ll stop at nothing to gain the power that resides in his predecessor’s daughter. Just when it appears Basara, Mio, and...

High school student Toujo Basara’s life has taken a turn for the strange. When his father suddenly remarries, Basara finds himself with a couple of drop-dead gorgeous step-sisters--who just happen to be members of a demon clan! Naruse Mio is a Demon Lord and Naruse Maria her succubus servant. Chaos...

ALL HELL BREAKS LOOSE! Basara Toujou is hesitant about his father’s sudden decision to remarry, and yet can’t deny it comes with a couple perkstwo adorable little sisters. But Basara’s new family isn’t all it appears to be, and when his father leaves on an abrupt business trip, Basara learns...

“A big brother always protects his little sister…even if it turns the whole world against him!” The enemy is finally making their move, seeking the Demon Lord’s power hidden within Mio’s body. But during the assault, a pinnacle moment of Basara’s past is revealed, and with it, a true glimpse...

A NEW HERO APPEARS! With hardly a moment’s rest since saving Mio from the White-Masked Demon, an even stronger enemy has appeared. As the timetable tightens on the new Demon Lord’s reign, he’ll stop at nothing to gain the power that resides in his predecessor’s daughter. Just when it appears...

“People aren’t limited to just one precious thing” Mio, Heiress to the Demon Lord’s Power, begins her battle with the heroes who have been sent to eliminate her. But Basara has a plan to curb the crushing force they have brought. Fight for the things that are precious to you! The mad flashing of swords continues in volume 4!

Enraptured by the idea of school, Maria decides to drop in on Basara during class! Her visit soon turns into a full-on investigation of the school grounds… “in case of emergencies”. A likely excuse, until an emergency involving Basara and Mio occurs in the girls locker room. Meanwhile, true danger on campus is rumbling in the distance…the fated treacherous battle will soon begin!

After having been chased to her wit's end by Takashi, master of Byakko the Spirit Spear, Mio finds herself in a pinch. Yuki has made her last stand, and the wounded Basara has yet to regain consciousness. All preconceptions will be blown away in this thrilling battle of love and hate!

Everything's on the line--Basara and his allies charge headlong into battle against their deadliest enemies yet. Zest brings her full might to bear against them, but even she pales in comparison to the threat waiting in the wings: The dread demon Zolgia! Against a foe so strong, has Basara met his match? He'll need everything in his arsenal to make it out of this one alive!

Basara's final showdown with the demon Zolgia rages towards its inevitable conclusion! With the power of a Demon Lord on the line, neither side can afford to back down. The fate of both the human and demon worlds are at stake: The Testament of Sister New Devil reaches its exciting finale!

Mio's been captured by the man who destroyed her family! Just when she thinks all hope is lost, Maria makes an appearance--but is the succubus really there to save her? Meanwhile, Basara is trying desperately to get Lars to tell him where Mio's been taken, but Lars won't give up her location without...