A documentary-style work depicting Miku Ootsuka, a pure and cheerful girl, being drawn into the world of BDSM. As she is bound and tormented, gradually discovering the pleasure of submission, her latent masochism awakens and she transforms into an obedient dog. During her first anal experience, she writhes in sensation, savoring the pleasure until she becomes completely entranced. The realism and her transformation are key highlights of this release.