Kenji Saito: 20 books

Arata Kasuga is living an ordinary life with his cousin, Hijiri, when a mysterious happening called a "Breakdown Phenomenon" makes her vanish before his very eyes. Determined to eradicate the Breakdown Phenomenon and get Hijiri back, Arata enrolls at Royal Biblia Academy. It's a tough road...

Not long after Arata enrolls at Royal Biblia Academy to become a magus do rumors begin to circulate about him being a "Demon Lord candidate." But with these rumors come gorgeous female mages...and one of them calls herself the future bride of the Demon Lord! With help from his friends, Arata...

At the Royal Biblia Academy, magical occurrences are commonplace...but ghosts?! While investigating a supernatural rumor at the school, Arata and his friends find themselves trapped in the Eternal Library--where a pigtailed beauty suddenly appears before their eyes! Just who is this very familiar-looking...

An extra-SEXY volume packed with all the fan service readers can handle! The ladies of Trinity Seven...visit the hot springs! The ladies of Trinity Seven...have a cosplay battle! The ladies of Trinity Seven...show off their swimwear! Titties and titILLATION abound in this lighthearted detour before the series heads back to the serious main story!

During a field trip with their middle school classmates, childhood friends Kaguya and Himawari are abducted by the secret society Millennium. The evil organization is notorious for the havoc it's wreaked, but is it possible they're...not the bad guys? After Kaguya gets a glimpse behind the curtain,...

Lilith has been captured by her own father, the demon lord Abyss Trinity, and he's poised to annihilate Arata Kasuga and his companions. In the face of "Vanitas," the overwhelming power possessed by Abyss Trinity, their only hope is a secret weapon hidden within Sky Library--but the demon lord won't make things easy! Can Arata overcome this most dangerous opponent?

Arata has obtained the power of Judecca, the Black Imperial Sword! But Abyss has a Demon Lord Weapon of his own--Caina, the Red Emperor Sword! As the clash between the two Demon Lords comes to an earthshattering climax, will Arata be able to achieve victory and save Lilith?!

It's a face-off between Luxuria masters, as Lilith and Anna battle it out! There's only room for one of them in Trinity Seven--who will reign supreme? In the world of Demise, Arin and Hijiri partner up on an important quest--rescuing Arata! He's sleeping deep within the halls of the Terminus Library. Will the power of true love be able to wake him from his slumber...?

Arata has vanished, and it's up to Trinity Seven to save him! Akasha Academy is the prime suspect--what is Anastasia hiding behind her knowing smile? The girls from Biblia and Liber Academies must form an unlikely alliance to ensure Arata's return. They say that "the enemy of my enemy is my friend," but can that new friendship survive...a Breakdown Phenomenon?!

It's time for the main event of the school festival: the Magic Research Battle! All of Trinity Seven (plus Arata) are arming themselves for battle against tough opponents from the rival Royal Magical Academies, but first they'll have to face...each other?! It's a knock-down, drag-out fight to the finish with only one team left standing!

The Magic Research Battle continues with an anticipated match--magical geniuses Lilith and Mira vs. fighting powerhouses Akio and Levi. But unbeknownst to Trinity Seven, there's something sinister underfoot. The Maguses of Akasha Academy are calling for the start of...the UNDERGROUND Magic Research Battle?!

When the fierce battle with Liese comes to an end, Arata undergoes an unthinkable transformation and begins diligently devoting himself to his studies. And when Lilith catches him at it, she volunteers to be his...private tutor?! Meanwhile, Royal Liber Magic Academy, one of the three great magical...

One of Trinity Seven's own members, the fiendish Liese, attacks Arata with a "passionate kiss" that purloins all of his magical powers! With the Demon Lord Candidate's magic in her possession, Liese's powers are unmatched. But the key to defeating Liese must lie with the Demon Lord Candidate...

All of the Trinity Seven members have finally gathered as the fierce battle between Arata and the demon Hijiri finally reaches its finale! But there's no rest for the weary as a new development quickly springs up, and this time the stage is set in Sky Library!! Since ancient times, it has existed...