The original light novel series 'Nanana's Buried Treasure' by Kazuto Okada was first published, laying the groundwork for future adaptations.
The anime adaptation of 'Nanana's Buried Treasure' was aired, bringing the story to a wider audience and increasing its popularity.
A manga adaptation of the series was published, expanding the franchise's presence in the manga community.
Jugo Yama arrives at Treasure Island Dormitory, the campus dormitory rumored to have hidden treasure left by the ghost Nanana.
Jugo meets the ghost Nanana, who is trapped in the dormitory and reveals information about the buried treasure.
Jugo teams up with other students, including Himeno and Haruka, to search for Nanana’s buried treasure and uncover mysteries of the island.
The team discovers the first clue leading them deeper into the treasure hunt, encountering traps and puzzles.
The team uncovers critical information about Nanana's tragic past and the reason she haunts the island.
Jugo and friends perform a ritual to free Nanana's spirit, lifting the supernatural curse on the island.
The treasure hunting team finally locates the legendary buried treasure, uncovering its secrets.
