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.
Season 1 was one of my favorite anime binges in a long time. Such a fun mix of thoughtfulness (movement through time), silliness, and cool scenes (The Ruins of The King's Tomb). I can't wait to watch season 2. I know it's airing as I write this, but I like taking in entire seasons at once if I can manage it.