The CUREtto Detective Agency gets its first client.

Anna goes to Makoto Mirai Academy, Mikuru's school, to give Mikuru an umbrella, but then she meets a troubled woman named Mariko who is looking for her little sister Keiko. Meanwhile, Mikuru is asked by the school's Chairwoman to solve a case involving a ghost in the high school.

Mikuru leaves the care of exhausted Pochitan to Anna and Jett-senpai.