Anyamal Tantei Kiruminzoo EP2 - Is it True ... That I'm a Dog!?

Riko and Rimu come home to find their older sister Nagisa Mikogami upstairs in the attic. They decide to show her the "Kirumin" devices that they found and give her one as well. Nagisa transforms for the first time and tries to imitate her animal, Riko and Rimu join in as well. After a certain mishap Nagisa transforms into her animal form to save Rimu from drowning.