A creep-doctor created a back room in the female toilet,
and lives there while filming them.
"Artists of the Dark" buy these images for a high price.
One day, the hospital underwent some investigation.
Saki was one of the investigators, who quickly suspected the creep-doctor.
However, the investigators didn't realize,
that while they were investigating undercover,
there were also being "investigated"...
"Let's introduce these women to an artistic world..."