If a student can't make it 100 meters, additional instruments of 'torture' are added, and during yearly long-distance swim class they're not removed until the end of the day.Right now, students are continuing relay-style swimming with the goal being the academy's isolated island.The distance to the remote island is about 7 kilometers. After each person goes 100 meters, they switch with someone else in the class, going however long it takes to reach the goal.~A certain academy's long-distance swimming lessons~The students' virginity is enforced, but the academy exploits all their other erogenous zones every day.Throughout the long-distance swim, a powerful vibrator is wedged into each girl's sensitive anus, continuously tormenting her and providing fair difficulty to her swimming.