In the Heart of Kunoichi Tsubaki Season 1 Episode 8
The Strongest Team / Nee-sama
Team Boar is back in town, and if it weren't for a certain quirk they have in common, they would probably be unstoppable. When Rindou wonders why Sazanka calls Tsubaki "Nee-sama," she gets a story about how Team Dog first came to be.