Welcome to the El Palacio

A young man wakes up one day to find himself in El-Palacio, a dwindling all-female professional wrestling organization which currently houses five wrestlers. He learns that he was nearly killed in a traffic accident, but was saved by Ouka Shumisen, one of the wrestlers, but thanks to the rough nature of the rescue suffered a blow to the head and developed amnesia, rendering him unable to remember his identity. Ouka declares that the young man is now her manservant, naming him "Tadasuke Ooka" after the legendary samurai and magistrate, and can stay at El-Palacio to serve as their referee and perform general tasks while he tries to recover his memory.