"Takeba, hold still, please"
"mmph"
Yukari moaned as the succulent cinnamon pastry slowly made it's way through her mouth. She couldn't help but wriggle a bit from the fullness of her stomach as Mitsuru placed another cinnamon roll between her lips.
This wasn't the first time Yukari had been in this situation, sprawled on her bed as Mitsuru stood over her with a box of sweets, Yukari's stomach distended to it's limit, straining the buttons of her pink cardigan and red from pressure. Over the last few weeks, Mitsuru and she had been having secret sessions like this regularly.
It had been an accident, discovering each other's... secret pleasures. A little more than a month ago, the members of S.E.E.S. had held a banquet, the occasion for such a feast escaped Yukari at the moment, and she had had too much to eat, her stomach similarly taught as it was in the present. Yukari found herself liking the feeling of letting go, eating past her limit without a care for how it affected her waistline, something she had never allowed herself to do before that moment. It was a new sensation, one she couldn't quite explain why it felt so good to her. Unbeknownst to her, Mitsuru had also found pleasure from the circumstances, albeit in a different way.
At first, both had tried to keep their desires secret, Mitsuru from Yukari, and Yukari from everyone in general. Mitsuru spent a couple of weeks attempting to contrive excuses to get Yukari to stuff her face, and Yukari, looking for opportunities to do exactly that, obliged. As time passed, and Mitsuru noticed how eager Yukari was to eat, and Yukari noticed how often Mitsuru gave Yukari the opportunity, secrets came out, and the two decided to share the experience with one another more honestly.
In the last month or so, Yukari had gained an impressive amount of weight. She had gone from being a girl of relatively average size, just under 130, to officially overweight at 160. The weight had not concentrated in any one place, at least not yet, but instead had spread all over. Her once slender frame now had a noticeable potbelly that hung into her lap and pushed against the buttons of her shirt even when she wasn't full to bursting. Her breasts now fought for space against her bra, and her thighs now rubbed together slightly when she walked. Her skirt rode up along her enlarged buttocks, and her face was considerably more cherubic. She had yet to upsize her wardrobe, but at the rate she had been gaining, she would certainly need to very soon.
"Well, I'm afraid that's the last pastry. I guess we'll wrap up here for the night." Mitsuru stated
"BRRRRRAAAAAPP!... excuse me." Yukari belched out, relieving some of the immense pressure in her gut "Oh, this feels so good, Mitsuru-senpai. At first, I just wanted to eat. I'd never just let myself eat whatever before, y'know? But now, it's not just that. I never thought I would say something like this, but I think I'm actually liking this fat. It's so soft and it's... it's... something. It feel better than I thought it would, that's for sure."
"Is that so?" Mitsuru inquired with a grin "In that case..."