Panya, a cat-like creature, resides under the care of the Nuko Club at Yuihime Girls' Academy. Founded by Miu Amaha, this club focuses on rescuing and rehabilitating injured wild animals for release back into nature, with Panya among their charges.

Miu first discovers Panya and commits to its recovery. The creature later guides Shingo Uryū to the club's shed, where he meets Miu and learns about their activities, initiating Shingo's connection to the group.

When two abandoned kittens arrive at the club, members temporarily name them after influential figures: a black kitten becomes "Shingo" due to its reaction to Shingo Uryū's name, and a white kitten is dubbed "Miu" for its response to Miu Amaha's name, while permanent homes are sought.

Panya stays in the Nuko Club's care throughout the depicted events, alongside other animals like the kittens. The club's daily operations and purpose center on sustaining this care to maintain its official school status.