Ultra Heaven

Kabu is a junkie and dealer with suicidal tendencies. Drugs are injected through tubes called "pumps" or little patches placed on the skin. Kabu's drug of choice is called "Peter Pan," a euphoric hallucinogen. The drug isn't really doing it for him anymore, so he goes to pump bars and tries dangerous drug combinations that might kill him, so he can have the ultimate high of a near-death experience. He goes to a pump bar and asks for a dangerous mixture of drugs, but instead the maestro gives him a special called "Nova Express," which simulates the experience of dying. After the trip, Kabu stumbles out of the bar in a daze, closely watched by two mysterious salarymen who comment that a junkie like Kabu would be the perfect subject for their experiment.

The manga was serialized in Enterbrain's seinen manga magazine Comic Beam starting in its July 2001 issue, with several hiatuses. Enterbrain collected the manga into three tankōbon with the first on February 25, 2002, the second on March 25, 2005, and the third on November 26, 2009.