When a notorious space pirate's ship crashes near his family's temple, Tenchi Masaki's world takes a drastic turn. By rescuing the pirate, Ryouko Hakubi, he unknowingly invites a parade of alien women into his home. Among them are the refined Princess Aeka, her spirited sister Princess Sasami, the absent-minded detective Mihoshi, her competent partner Kiyone, and the quirky scientist Washuu. Despite their efforts to adapt, their advanced ways clash with Earth's simplicity, leading to chaos and headaches for Tenchi. Despite the chaos, Tenchi forms deep connections with each woman, unraveling his place in the vast universe through their relationships.