[Minami Hatsukawa First full-scale lesbian scene!] Behind the scenes of the development of a vaccine that will save the world, a secret rumor is whispered... Suspicions emerge that illegal activities are being carried out in the development of a vaccine at a major pharmaceutical company, and rookie elite investigator Minami is sent undercover to investigate... No matter how many times she is made to cum, the investigator remains true to Kokoro of justice and never gives up, making the lesbians smile with joy and pleasure. Minami Hatsukawa's first full-scale lesbian scene in the popular investigator series.