Tenchi Masaki is an ordinary guy who accidentally releases a demon trapped in a forbidden cave. This "demon" has been imprisoned for hundreds of years, and now she wants revenge! Looks like Tenchi's in trouble!

Tenchi's life is disrupted once again when some visitors from Jurai arrive. Funaho, Tenchi's Juraian great-grandmother, and her sister Misaki, who is also Ayeka and Sasami's mother, are paying a visit to Earth. Funaho has come to see her son Yosho, and to make an interesting offer to Washu. Soon after, Misaki and Funaho's husband, King Azusa of Jurai, arrives and tells Ayeka that she must marry the man he has chosen already, Seiryo.