Phoenix Season 1 Episode 12 Future, Pt. 1

Moopie is an extraterrestrial being that can bring feeling of pleasure directly to human brain. Although it is prohibited to possess Moopies, Masato falls in love with a Moopie named Tamami. After escaping from an underground city called Yamato, Masato and Tamami make it to Dr. Saruta, an authority on artificial beings who lives in private on the ground. Then Rock, who has chased after Masato, arrives at Dr. Saruta's lab. Just then a full-scale war between underground cities breaks out, resulting in the extermination of the human race. All people die out leaving only three of them. Soon Dr. Saruta and Rock also come to end of their life. Masato who can not die due to his immortal body and Tamami, a Moopie with strong vital energy by nature, are left alone.