"The much-awaited Battler Party is finally here, and Iruma and the demons of the Magical Apparatus Research Battler are ready to blast the competition away. But when a surprise shakes Babyls to its core and threatens to upend all the festivities, it's upto Iruma and his friends to find the culprit before time runs out. Unfortunately for them, true evil may be lurking closer than they think"--

"His first-ever personal goal reached, Iruma wonders what he should set his sights on next. Fortunately, there are a whole host of battlers, organized group demonic activities, that could provide the perfect pursuit. Doors open for Iruma at every turn, but do these Netherworldly clubs actually want him...or do they only want the magic in his ring? Iruma's search for a battler where he belongs sends him crashing straight into a rare demon without magic,...

"Despite his best efforts to avoid attention, Iruma's dumb luck and good nature have made him the talk of Babyls. But his unwanted fame has also caught the eye of the student council president, Ameri, who suspects that Iruma may not be the demon others think he is. As Iruma's string of uncanny feats continues, Ameri draws closer to the truth, and before long, their worlds come crashing together in a fateful and heart-pounding encounter"--

After he learns he is the son of Poseidon and is accused of stealing Zeus' lightning bolt, Percy Jackson sets out to recover the bolt, prove his innocence, and prevent a war between the gods that could destroy the Earth.