Nakako Kashiwabara, a member of the Space Special Investigation Unit, suffers near-fatal injuries during an investigation to capture space criminals. Saved by the secret government project known as the "Big-Tits Special Search Project," she is revived and reborn as "Big-Tits Special Search Pioneer," tasked with protecting peace across the galaxy. One day, Nakako discovers a human trafficking operation run by the secret organization Gilla and uses her Pioneer abilities to arrest both the combat units and the human trafficker Bayern in one swift operation. However, her actions begin to interfere with their plans, prompting space criminals to conspire and plot her downfall...