The summer supernatural teen comedy revolves around an ordinary high school boy named Takashi who ends up living with a space alien's spirit (uchūjin no yūrei) after a strange incident. He names the creature Uchurei and plans to keep it as a pet, but becomes possessed by it. (Source: ANN)

Based on a 1980 manga by Mikuriya Satomi, this adaptation differs considerably from the original. The story started in its prequel was completed with this second OVA.

Maetel abandoned her mother and her home planet, the doomed and frozen La Metal, where people must become cyborgs to survive. When she is beckoned to return, her options seem slim: follow her mother's path (and with it a robot mind and the contempt of all humans), or run away and fight with humans against the machines. Yet, she is not without comrades and defenders. If she can accept the friendship of beings of metal who desire peace, and oppose those who think being made of flesh and blood is enough to make one human, she may still have a chance to find her own path. (Source: Anime-Planet)

It is the thirty-first century. Ulysses killed the giant Cyclops when he rescued the children and his son, Telemachus. But the ancient gods of Olympus are angry and threaten a terrible revenge: Ulysses is sentenced to travel through the universe of Olympus with a frozen crew on a quest to find the Kingdom of Hades. Only when he has found the Kingdom of Hades will his crew be free of their curse and he will be able to return to Earth and to his beloved Penelope. (Source: AniDB)