In this adult school-role-play fantasy, students with no money for a hotel and no privacy at home discover that the classroom after midnight is the perfect place to have sex. Rumor spreads that anyone who visits looking for a partner is guaranteed to get lucky, provided they avoid the security guard's patrols. Couples sneak in and slowly indulge every pent-up desire for as long as time allows. The circle keeps expanding, and even an adult female teacher is rumored to use the classroom for secret encounters with an adult male student. After dark, the familiar room takes on an atmosphere that makes everyone far bolder than they are during the day.