Yama Juugo is a high school boy who has moved to Nanae Island, also known as ...
Nanana's Buried Treasure
Season 1 Episode 3: The Ruins 1,000 Meters Above Ground
After clearing the ruins in the classroom, Juugo, Tensai, and Daruku become members of the Adventure Club. At club president Yuiga Isshin's request, Juugo undergoes a trial administered by Nanana to get her to share the location of the next treasure. This complete, the Adventure Club sets off to the Rising Building. As they search for the ruins, Tensai quickly finds a certain door...