SVDVD-776 Coed anal health check at the shared school spring 2020

A global pharmaceutical company needs to collect data on the rectums and anuses of minors for a clinical trial of a new drug that has revolutionary effects on rectal cancer. In exchange for a massive donation, the principal of a certain co-ed school agreed to conduct anal health examinations using students as test subjects. It's easy to imagine that this would be sensational news if it were made public. To keep it more secretive, they decided to include both male and female students, as well as forcibly involve their homeroom teachers. The students were enticed with the prospect of improved internal grades and recommended admission. The female teachers were subjected to mind control with the phrase 'As educators, you should set an example for your students.' Thus, mixed-gender anal health examinations began.