Seina Yamada, commonly known for his bad luck, had a life-changing encounter with a recruiter searching for his senior colleague, Tenchi. This eventually led to him being enlisted in the Galaxy Police, which dramatically improved his life. Seina acquired excellent skills in decoying strategies that involved luring out notorious pirates. Amidst his journey, he met four extraordinary women with the ability to transform his luck into favorable outcomes. Together, they commanded the most significant starships in the Tenchi Universe and battled against the threatening Da Ruma pirates. Despite this, Seina found himself in a quandary regarding his romantic interest. He had to choose between Amane Kaunaq, the former model turned Galactic Police detective, his long-term friend Kiriko Masaki, Ryoko Balta, the secretive woman named after a notorious pirate legend, or the youthful priestess Neju Na Melmas, who possessed incredible powers and had lived for two millennia.