Can vocal training combined with choking enhance one's singing voice? An unconventional work fusing asphyxiation and singing makes its debut. Risa, a female teacher and vocal coach, suggests breath control through neck compression to Hikari, a struggling student during choir practice. Hikari hesitates but begins vocal exercises while being strangled. As she struggles to produce sound, she collapses unconscious—yet Risa continues tightening her grip. In truth, Risa is a choking-obsessed sadist who brainwashes Hikari, leading them into a twisted mutual obsession. Wearing black leather gloves, using ropes, ties, and other restraints, they take turns choking each other into blissful unconsciousness. The madness escalates with shocking titfuck asphyxiation scenes. This forbidden footage captures the abnormal relationship between a deviant female teacher and her student, both addicted to the ecstasy of breathplay.