Yoru no Houteishiki

Saeki Sayoko is more than she appears as she takes a position as academy counselor and school nurse in an all-boys academy. When boys begin to be found dead overdosed on a potent drug suspicion falls on the very beautiful and very buxom Saeki, but more than just drug-dealing is going on after-hours at the academy. Will Saeki find out who is behind the drug-dealing and will she be able to find the people and things responsible in time?