Shinji Ikari's large, soft bottom was lowered into the bariatric wheelchair.

"Here you are, my pet," said Kaworu Nagisa, settling the bulk of the enormous boy into the enormous seat. It was almost like a bed or a lounge on wheels, since it had a large padded shelf protruding forward from the main seat, for Shinji's belly to rest on. It was also almost as big as a bed, given how wide it was.

But Shinji's fat face rippled in concern. "Oh, hmm, Kaworu-san..."

"Yes, my darling?" Kaworu said, playfully tickling Shinji's second chin.

"I'm feeling just a little... ah, hmm, just a tiny bit..." he shifted in his seat, causing the wheelchair to creak, "pinched." He glanced over his shoulder. His huge bottom bloomed far out to the left and the right, and billowed backwards in a portly fat shelf. Shinji kneaded his chubby hands together atop the great slope of his gut. "I do think I may be outgrowing this chair."

"Well, my pet, you weighed in at 407 kilograms the other day," said Kaworu. "It is not surprising that you are beginning to exceed this chair; we've had it for more than a year. Do you recall when you fit comfortably inside it, even with room to spare?"

"I do, Kaworu-san!" said Shinji, smiling. He made what he thought was a sexy face, one that really looked ridiculous on his enormous fat pig's face. He put his hands out on the billowing spread of his hips. "But... I've grown... for you."

Kaworu leaned in, and kissed Shinji on the lips. Shinji cooed in pleasure at the touch of his boyfriend's lips.

"You have indeed, my precious boy," said Kaworu. "Which is why our first stop out today, at least after we get you a snack, will be to the bariatrics emporium on Chester Street. I have anticipated you outgrowing this wheelchair for some time, and had a newer, larger one specially ordered. It should be ready; I believe it was ready last week. Let us go and pick it up."

"Oh, boy!" said Shinji, clapping his hands together. The big, swollen bags of fat on his upper arms sloshed back and forth from the motion. "Oh, Kaworu-san, let's do my makeup and then go!"

Kaworu wheeled Shinji up to the vanity in his bedroom. There was all manner of makeup strewn across it. "Now, my pet," said Kaworu, "let's not do anything elaborate today. After all, you're just wearing a plain pink muumuu and some sandals. Let's keep your makeup light."

"Yes, Kaworu-san," said Shinji. He smiled simperingly. "You always know best."

Kaworu reached back and possessively stroked Shinji's large left buttock. The crinkle of the fabric of the bariatric diaper was loud in the soft, quiet room. Then Kaworu began to pick up the makeup and apply it to Shinji's face. As mentioned, nothing elaborate. Some foundation, a bit of light blush, soft, dark red lipstick, and just the faintest touch of rouge around the eyes. When he was done, he stood back. "Now, my pet, how is that?"

Shinji smiled. His enormous, sagging jowls oozed outward and downward from the motion of his lips, accentuating the permanent dimples around his mouth. His big, fat chins jiggled faintly as they sagged lower. "Oh," he said, face rippling slightly, "it looks nice. Very relaxed." He pointed one of his fingers; his fingernails were painted with white nail polish. "Now, let's go!"

Kaworu pushed Shinji out of the bedroom, down the hall, into the huge family room of the large apartment. The apartment was bigger than many houses; Kaworu's infinite resources ensured Shinji lived in absolute luxury. They rounded a corner and headed down the entrance hallway towards the door.

Frrrrtt

Brrrbbttt

"Oop!" said Shinji, makeup-clad face billowing comically. "I think I'm gonna"

PLLRRRBBBBBTTT

A hot, soft mass of waxy yellow-brown poop emptied out into Shinji's diaper. It billowed from his loose anus, flowing freely. Shinji couldn't have stopped it if he wanted to; years of gay sex had rendered him fecally incontinent.

"Oof, that feels good," said Shinji. He patted his monstrous belly. "All that breakfast... I guess it's starting to come out."

"Oh, Shinji-kun, we haven't even left the apartment yet," said Kaworu, red eyes glinting. "Do you want to go back and change into a clean diaper?"

"Oh, I don't think so, Kaworu-san," said Shinji, smiling and waving a fat hand at his caretaker. "I've already gotten all dolled up, I'd just have to be dressed and made up all over again if we changed me. Besides," he chuckled, "I'm almost certainly not done pooping."

"I do forget sometimes how comfortable you are sitting in your own waste, Shinji-kun."

"Oh, absolutely, Kaworu-san," said Shinji, laughing in a way that made his chins wobble. "After all this time, it's no big deal to me at all. It's not like I have to walk around in it, after all. Sitting around in a poopy diaper... it's just no trouble at all!" He laughed again. He pointed at the door. "Now, let's run those errands. Including getting me that new wheelchair."

Kaworu leaned in and kissed him on the cheek. "Such a good boy."