Nanana's Buried Treasure - S01

Nanae Island is an artificial island in the Pacific built to nurture and educate young people. It was founded by the Great Seven, a band of adventurers led by Nanana Ryuugajou, as a place for the next generation to pursue their ambitions. Juugo Yama, a high school student cast out by his family, arrives on the island, relieved to escape his father’s control. But when he moves into his new room, he meets the ghost of Nanana Ryuugajou, who has lingered there since her unsolved murder ten years earlier. Nanana reveals that before she died, she scattered powerful and enigmatic artifacts-the Nanana Collection-across the island. Determined to find clues about her killer, Juugo teams up with Tensai Ikkyuu, a self-styled "Master Detective," and her maid Daruku Hoshino, who dresses in men’s clothing, to begin his search.