Nanana’s Buried Treasure anime
Nanae Island, a man-made Pacific Ocean island that houses everything needed for proper education and training children, is called Nanae Island. The Great Seven, an adventurer group led by Nanana Ryuugajou created it as a place where young people could pursue their dreams.
Juugo Yama, a high school student, arrives on the island happy to be free from his father after being exiled and disowned by his family. After moving into his new bedroom, Juugo Yama discovers that Nanana Ryuugajou’s ghost is there, bound to the island by her unsolved murder of 10 years ago. Juugo is told by Nanana that she had hidden items with mysterious and unique powers on the island just before her death. These items are known as the Nanana Collection. Juugo sets out to find clues to help him locate the murderer behind Nanana’s death. He is assisted by Tensai Ikkyuu, a self-described “Master Detective”, and Daruku Hoshino (a cross-dressing maid).