Demon Diary Series by Kara, Lee Yun-Hee

Raenef is the black sheep of the demon court, with minimal knowledge of magic and courtly etiquette. In order to help him claim his birthright as a demon lord, the demon masters send him the wise and noble teacher Eclipse to be his tutor. As Raenef and Eclipse begin their journey of discovery, they find that the bonds of friendship are stronger than the teacher/student relationship... moreRaenef is the black sheep of the demon court, with minimal knowledge of magic and courtly etiquette. In order to help him claim his birthright as a demon lord, the demon masters send him the wise and noble teacher Eclipse to be his tutor. As Raenef and Eclipse begin their journey of discovery, they find that the bonds of friendship are stronger than the teacher/student relationship. This volume also includes two bonus stories drawn by the same illustrator but by a different author; "Crystal Heart" and "Terra". less

After failing his tutor, Eclipse, and sparing the life of an enemy life (very un-demonlike!), young Raenef decides to leave his homeland alone until he's become a Demon Lord. But life in the big world isn't easy for an unskilled demon. There are many who hate demons and would kill Raenef on sight. When Raenef stumbles into the temple of Rased, he meets someone who would love to do just that. Fortunately, Raenef isn't the only one who's still in training.

Eclipse recalls the first time he met Raenef and realizes that the life of a demon lord is fraught with peril. Demons are feared and hated by most of humanity due to their arrogance and willingness to use their powers for personal gain. Although Raenef is not your typical Demon Lord, his heritage and his good-natured demeanor make him an easy target for an assassin.

Gods and demons wage a never-ending battle with the mortal realm of Earth as their battlefield. As with most long-standing feuds, the reasons are no longer important--hatred is a way of life. But it is foretold that one will arise who can restore harmony between gods and demons. Enter Raenef, heir to demon royalty. But he is hardly regal material. Therefore, the demon king assigns Eclipse to be his tutor and to mold Raenef into proper demon shape... moreGods and demons wage a never-ending battle with the mortal realm of Earth as their battlefield. As with most long-standing feuds, the reasons are no longer important--hatred is a way of life. But it is foretold that one will arise who can restore harmony between gods and demons. Enter Raenef, heir to demon royalty. But he is hardly regal material. Therefore, the demon king assigns Eclipse to be his tutor and to mold Raenef into proper demon shape. The two begin a journey of discovery, and are soon joined by a human knight and a god-blessed priest. less

Be Careful What You Wish For...Despite his best efforts, young Raenef the Fifth can't help but embarrass his tutor, Eclipse, time and time again. Still training to become a Demon Lord, Raenef's friendly and loving nature makes Raenef look bad...and Eclipse look even worse. Fed up with his failures, Raenef does what he once considered unthinkable...and actually tries to study.However, when one hits the books in a demonic library, the books sometimes hit back... moreBe Careful What You Wish For...Despite his best efforts, young Raenef the Fifth can't help but embarrass his tutor, Eclipse, time and time again. Still training to become a Demon Lord, Raenef's friendly and loving nature makes Raenef look bad...and Eclipse look even worse. Fed up with his failures, Raenef does what he once considered unthinkable...and actually tries to study.However, when one hits the books in a demonic library, the books sometimes hit back. After Raenef suddenly becomes frightening and develops a terrible personality, will Eclipse consider his mission complete or will he start wishing for the "good" old days? less

You Only Hurt The Demons You LiveWhen Chris was a child, his village was attacked by an insane demon horde. In the siege, the god Rased spared the young boy and buried his memories of the devastation. Chris still carries Rased's power and a hatred of demons -- despite his odd friendship with the cuddliest and most lovable Demon Lord ever, Raenef V! What will it take to make Chris and Raenef duke it out in a no-spells-barred magical melee?

As a young Demon Lord-in-training, Raenef has experienced it all -- he's fought the good fight, made close friends and developed a deep bond with his tutor Eclipse. Despite his scattered nature, Raenef has learned everything there is to know...and now it's all gone! In this final volume, Raenef finds himself back on the street with holes in his memory, his wallet, and his heart. An unforgettable fate awaits the world's most lovable Demon Lord!