What is the movie about the Japanese woman with a unicorn tattooed on her body?

Amma takes Louie to a store with a spooky atmosphere. The owner of the store, Shiba (ARATA), is covered in tattoos, adorned all over his face, and dresses even more punk than Ama. He is a tattoo artist and self-proclaimed sadist. Louie is so excited that she falls in love with body modification. She pierces and studs her tongue in preparation for a step-by-step transformation into a snake's tongue like Ama. She also asked Chai to tattoo a dragon and a unicorn on her back, the dragon on Ama's back and the unicorn on Chai's right arm.