Prince Lloyd de Saloum—once a commoner who could never grasp magic—is now blessed with inexhaustible mana and has all the time in the world to master it, as he has no claim to the throne. After mastering demonic magic, he sets his sights on the Church to learn the secrets of divine magic that will bring him one step closer to completing his arsenal. However, due to his fondness for unholy magic, he draws the scrutiny of divine beings who see him as little more than a demonic spawn.

Every man wants to see panties, but unfortunately, that happens to be difficult to achieve. They are hidden beneath layers of clothing and seldom shown, other than to the trustworthy. They are considered the final frontier and the last barrier between a woman's bare skin and the wider world. The moment a girl shows her panties is when she is the most vulnerable. It would be absurd to simply ask to see them—or would it? If a variety of girls were brazenly asked to show their panties, they would naturally be filled with contempt. But if one were to beg hard enough, they just might be lucky enough to get a peek.

Vampires are known to have many weaknesses that balance out their incredible power, but the vampire lord Draluc happens to be weak to pretty much anything. The vampire hunter Ronald receives a job to infiltrate the castle of the so-called Invincible Progenitor and rescue a woman's son from the monster within. But upon arriving, he is dumbfounded to discover that the vampire quickly turns to ash by something as trivial as a clap of his hands! Moreover, the child he was sent to save had merely wandered in to play the vampire lord's video games while he slept! In a disastrous turn of events, Draluc's castle is destroyed, and the fragile vampire decides to move in with the hunter who has only just defeated him. Ronald, Draluc, and the vampire's pet armadillo John form quite the eccentric team as they are forced to work together while fending off Ronald's violent editor, the lesser vampires plaguing the city, and even their fellow vampire hunters.

The duke, full of love and kindness, treads carefully around every living being, be it a tender flower or his seductive maid, Alice Lendrott. Were it not for the devotion Alice shows him and the fondness that grows ever stronger between them, the duke would have barely paid heed to his mother's demand: to either lift the dreadful curse placed upon him or lose his family inheritance. Although the duke has no greed for riches, he yearns to be rid of his frightful powers—which cause all he touches to die—for the sake of those closest to him. As the duke, Alice, and their friends enjoy spirited days filled with the ridiculous affairs of the supernatural, the spring deadline looms heavily over them. Nonetheless, the duke refuses to take any shortcuts in this endeavor if it means betraying the trust of his cherished friends.