Dragon ReactorGuardian was allowing his friends some time in his tall water tank for Christmas. For the past 22 days, many people and monsters alike spent time inside. His method was to fill the tank with suitably heated water and then drop them in from the top. Mandy knew this and agreed to volunteer with Reactor. Reactor booked Mandy in for the 23rd of December 2018. She would bring her own fun. Other participants often described trying to escape, bondage or masturbating. Of course, Mandy decided on masturbating. The next day, Mandy woke up. She was so excited she could not sleep. Unfortunately for her, her playtime would begin at 4 pm. Until then, she did everything to distract herself from the thought of being submerged by ReactorGuardian. Mandy started by watching YouTube to pass the time, but she was restless. To further distract her was Minecraft or furry websites. Mandy even went as far as learning useful things. Later, while browsing, Mandy noticed it was close to 4 pm. She left her house quickly and run down the dark streets illuminated by street lamps to ReactorGuardians house. Sure, she disked drowning there, but that fear of drowning at someone else's hands in their water tank didn't deter her. At 5 past 4 pm she knocked on Reactor's door and tapped her feet. Reactor was waiting and opened the door shortly after hearing her knock. As the door fully opened he said "Hello, Mandy. Are you my next subject?" Mandy looked at him with a silly look and said, "Come on, you know I am." Reactor simply said, "Let's get you inside." Inside Reactor's basement was an oversized water tank full of comfortably warm water. It was the same tank others had played or drowned in. Above it was a rope ladder which you would access from steps a few meters distant from either edge. From the bottom of the ladder was a slight drop which rendered the ladder out of view when facing it directly. There were red and green fairy lights strung across the time and tinsel hanging on either side. In front were various presents with different coloured wrapping paper. Behind were lots of snowflakes that spread out from the bottom-left and top-right corners. Inside the tank were 2 pipes that come in through holes in the bottom. Mandy climbed down the ladder and looked inside through the square hole in the top. There was a flap of metal that could be opened or closed to let living things in or out. Mandy held her breath and dropped in. As the sunk halfway down she started to swim up, opened her mouth and released some bubbles which rose up and created ripples left of the centre of the hole on top. Reactor knew Mandy would like this and proceeded to close the flap. Trapped inside, Mandy revealed a vibrator she had hidden in her fur. The lay down in the centre of the surface on the bottom and spread her legs. She then pushed the vibrator inside her fortune cookie and turned it on. The pressure of the water combined with the vibrations deeply pleasured Mandy, who closed her eyes and held her breath to enjoy it. She put her paws on her stomach area and then opened her right eye to observe herself.