The keyword "" refers to a specific piece of fan-created content (a "doujinshi") from Comiket 72 (C72) , an iconic Japanese fan convention held in 2007.
In the official series, Naruto is the only person Tsunade allows to call her "Grandma" out of affection Narutopedia . c72 naruhodou naruhodo tsunade no inchiryou naruto link
This event took place in August 2007. Comiket is the world's largest self-published comic fair, where circles (independent artists/groups) sell limited-edition works that are rarely reprinted, making older titles like this one difficult to find today Coto Academy . The keyword "" refers to a specific piece
Dedicated doujinshi databases or image-hosting galleries that archive older Comiket releases. c72 naruhodou naruhodo tsunade no inchiryou naruto link
The fan work explores the unique relationship between Naruto and the Fifth Hokage, Lady Tsunade.