Tenchi Muyo! Ryo-Ohki Season 4 is a four-episode OVA that mixes action, comedy and science fiction. The Jurai and Masaki families are celebrating because Nobuyuki and Rea are at last getting married. As his father's wedding day approaches, Tenchi meets up again with the people he came to know on his journey and gets to know some new relatives. Everyone is finally gathered together, but Rea is keeping an important secret. It bears on the destiny of the child she will have, and it threatens to upset the harmony of the Masaki household.