Shinji Ikari incontinently shat himself as his fat body lounged in his wheelchair.

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"Ahh, a nice poo poo," said the colossal fat boy, porky face oozing as he smiled. The huge diaper he wore began to fill with feces, soft, warm turds flowing from his extremely loose anus. Shinji waggled his bright red fingernails. "I was feeling a bit plugged up, Kaworu-san, I was hoping I'd be taking a dump soon."

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"I suppose in that regard it is fortunate we had sex before we left the house, my pet," said Kaworu. "I am sure it loosened you up a bit."

"That's true!" said Shinji brightly, third chin wattling as he chuckled to himself. He popped another Reese's Peanut Butter Cup into his mouth. "I do tend to have a bowel movement within a few hours of us making love. It seems to kick things off!"

He had a family-sized bag of Reese's Peanut Butter Cups in his huge fat lap, and he was eating his way through it. He'd been eating since they left the house and he was about halfway done with the enormous bag. It rested on his whalish belly. Shinji really was incredibly fat these days. He was now over 400 kilograms, currently sitting at 404. He was a vast boy, huge and blobbish, with a gigantic belly, a colossal ass, enormous flowing hips, and folds and droops of fat everywhere you looked.

The huge teenage boy wore an enormous muumuu. Today's dress was bright red with white flowers on it. It matched his red nails, and he also wore red lipstick to complete the coordination. His pierced ears had diamond earrings in them, and he wore a pearl and diamond tiara atop his fat head. He looked like a fat queen, almost somewhat imperious in his spreading bulk and expensive attire. He felt smug and grand, beautiful and lovely.

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"Ngh," grunted Shinji, gripping the handles of his bariatric wheelchair.

"Trouble with the defecating, my dear?" asked Kaworu.

"It's, hmm... a big log," said Shinji, puckering his plump lips. A large, thick, girthy turd was currently oozing its way out of him, a contrast to the semi-solid nature of the rest of his dump so far. It was both slightly uncomfortable and somewhat arousing; when a big log came out, it felt a little like anal sex, and the similarities sometimes enticed Shinji in the midst of his pooping. His small dick became semi-hard, buried amid his hundreds of kilos of flab. The enormous boy had a miniscule penis, barely seven centimeters when fully erect. He considered asking Kaworu to use his Angel powers to jerk him off, but as the huge turd kept coming out, Shinji thought better of it. He needed to focus on finishing this dump. No sense dividing his attention.

"Still coming, Shinji-kun?" Kaworu asked, as they stopped at a traffic intersection. The walk sign came on and Kaworu began to push him across the street.

"Hoo hoo, yes, Kaworu-san, oof, this is, ngh, really something," said Shinji, and the wheelchair creaked as his huge bulk shifted in it. "This might be the biggest turd I've pooped out in years. I can't think where it might have come from. I haven't exactly eaten a lot of fiber lately."

"Thinking on it, Shinji-kun, you ate all that Mexican food the other day, and both beans and avocados are high in fiber. Perhaps that is the origin."

"That's true," said Shinji, putting a plump finger to his fat chins. "Wait, hold on.... ahhh, finally," he sighed and smiled as the huge log finally finished coming out of him. He could feel its mass against the vastness of his buttocks. He popped a few more Reese's Peanut Butter Cups into his mouth.

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"Hmm, I think that's it," said Shinji mildly, as one final putter of feces came out of his anus. No more emerged, and the big boy sat in his poopy diaper, satisfied with a job well done.

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"Oooh," he said, hearing the churn of his stomach. He smacked his lips. "I'm feeling peckish, Kaworu-san. Could we go get some food?"

"Of course, Shinji-kun, of course," said Kaworu. "That deli with the good sandwiches is just up here, we can stop in and buy you a few."

"Oh, man, that would hit the spot!" said Shinji, cherry red lips smiling in delight. "Some corned beef on rye... that would be just fine." He patted his huge gut.