PPPD-778 OPSAI Nurse SP, the milk cannon of the Big Breast Medical University, contains a sperm sample of milk from six giant nurses to a single drop of semen.

In order to upgrade the technology, the individual milk cannon training, three people to catch patients who can't easily be shot, and the patients with many problems to force six people out of their den with special sex, rubbing their nipples so that the meatsticks can explode.