Honoka deeply admired Dr. Arai, an ear, nose, and throat specialist, after discovering that her throat was her most sensitive erogenous zone. His research involved a bizarre experiment known as the "Deep Throat Orgasm Study," which trapped subjects orally and induced climax through intense throat stimulation. One day, after witnessing the procedure firsthand, she was forcibly made into a test subject herself. Enduring daily sessions of what was called research but felt like torture, Honoka gradually awakened to the pleasure of throat stimulation, eventually experiencing even greater ecstasy from it.