The first in a series of underwater training sessions for Diletta, the aspiring Kinky Mermaid. His Master's request is simple, to stay underwater as long as possible for his pleasure. Diletta is determined to fulfill her Lord's request and, after putting on her best bathing suit, she dives into the tub and starts working out. Everything is fine until the slave starts to get aroused and, using her favorite vibrator, gives us an underwater orgasm to remember for a long time!