Thick, Creamy, Delicious Pudding

Chapter 1: The Expirement Begins

It was a rather bright day as Sin walked to work. He had been working at the facility and with Milktank for a few weeks now and loved his job as if he had just started. He walked through the sliding doors and into Milktank's office with a smile. "Morning Milktank!"
"Morning Sin, we have a big test for today so I need you to not ask questions and just listen alright?" Milktank seems very excited, abright grin plastered too his face. "Uhm... alright. If you insist" Sin just sort of played along and obeyed his boss's orders and listened. "So I'm listening" he said sitting down patiently. "Todays the day we push your limits, all the stops pulled, were going to push you as much as physically possible in preparation for a large scale project the big wigs have had going for a while" milktank walks through the facility leading Sin down to a elevator. "Wow Milktank..... what could you possibly be doing to 'push my limits'?" He looked up at the hybrid curiously, then around the elevator, as this area was all new to him. "You like sweets?" Milktank ask the question out of the blue, typing in codes on the elevators controll panel.
"Sure do! They're my favourite kind of food!" He smiled proudly looking up at the distracted hybrid. "Perfect" the elevator starts going down WAY down. The total descent feels like forever but was only a few minutes before stopping at a massive open room. "Aww c'mon Milktank you've got me all worked up and excited! What is it!" Sin walked out with the hybrid as he looked around curiously at the wide new room.
"You'll see" milktank snaps his fingers and several panels in the floor open up, a massive vat labeled 'pudding' pushing out, the container is easily 8  meters tall, maybe more, as wide round as a pool, and a single hose snaking from the top. Sin's eyes widened and shined with glee as he gasped softly "pudding?! Aww Milktank pudding is my favourite!" Sin quickly hugged Milktank's side as he dashed over to the container looking over it. "You seem pretty excited about having every last drop pumped inside of you~"
Sin stopped dead in his tracks as he looked up at the vat, then back at the hybrid. "All.... of it..?" He said with slight hesitation. "All of it, were putting you too the test buddy, ready to start?" Milktank walks to stand infront of the other "We can call it off for the day so you have more preparation if you need it." Sin huffed in frustration "I-I can take it! I'm not some kid or something..." he stomped his foot down looking down at the ground. "Well then, the floors yours" Milktank gestures too the vat and steps back, a grin pulling at his face.