"Sinful Treasures"—cursed objects that bring disaster in exchange for immense power.The witch "Diabelstar," known as the "Sinful Treasure Hunter," visits a certain temple based on a strange rumor. Afterdefeating the approaching monsters, including "Snake Eyes," she reaches the deepest part of the temple, where she is confronted by the embodiment of the Sinful Treasure, the "Evil Eye Flame Dragon."Wielding the power of the Sinful Treasure herself, Diabelstar defeats the giant dragon.However, when she reaches for her spoils of war, the "Rebellious Sinful Treasure—Snake Eye," an unexpected object leaps out from within...!?

Snake-Eyes Poplar emerged from the "Sinful Spoils of Subversion - Snake-Eye."Unsure whether this strange creature is even a Sinful Spoil at all, Diabellstar finds herself at a loss over what to do with it, when the "Goblin Bikers," led by "Big Gabonga," suddenly appear.Seeking to settle a long-standing score, they unleash the Sinful Spoil-devouring monster, "Goblin's Crazy Beast," but then…!?

The White Forest— A beautiful and mysterious forest ruled over by a lone "witch."Long ago, the apprentice witch "Astellar" was taken in by "Diabell," a witch not of humankind, and spent peaceful days in the forest alongside fellow foundlings "Elzette", "Rucia," and "Silvy."One day, while walking through the forest with Elzette, Astellar is lured by a mysterious voice and discovers a beautiful red fruit.Astellar and Elzette decide to give the fruit to Diabell, the Master they love so dearly.But the fruit is a sweet, beguiling trap set by the "demon" lurking within the forest…