Everyone in the Light Music Club made plans to come over to Yui's house after school. Yui headed home alone since everyone else was going to change into casual clothes before they came over. Yui opened the door and walked inside and found her younger sister sitting on the couch.
"You ready for tonight?" she asked.
"Yeah." responded Yui, "Can't believe we got everyone to agree to this."
"This will be fun." said Ui.
Yui went off to her room looking forward to when everyone else would come over. While she waited, she did her homework, or at least, some of her homework until there was the doorbell ringed. Excitedly, Yui runs downstairs and answers the door. On the other side are all four of her friends from the Light Music Club, Mio, Ritsu, Tsumugi, and Azusa wearing their casual clothes.
"Come in." said Yui.
"I don't know why I said I'd do this." said Mio.
"It'll be fun!" responded Ritsu, "Don't deny it, you're looking forward to it, too!"
"Yes," said Tsumugi, "we're all so excited to be your dinner tonight."
"Do you know which one of us you're going to eat first?" asked Azusa.
"Dunno." responded Yui, as they all headed inside.
They went to the living room and Yui sat down on the couch. She looked at her friends and wondered who she should eat first.
"Oh, me!" exclaimed Ritsu, "Start with me!"
"Okay." responded Yui.
Ritsu lifted her shirt up, showing her orange bra and then unzipped her pants, showing off her matching panties. The other girls waiting to be eaten stripped down to their underwear too. Mio was in a purple bra and panties, Tsumugi's were white, and Azusa's were black. Ritsu quickly dove for Yui's mouth and started sliding in. Yui was surprised by her friend's speed but quickly got used to it and kept going. She swallowed some more and her belly started to expand. Ritsu's stomach slid off of Yui's tongue and then she got her panties and her legs wiggled all the way down. With some more swallows the rest of Ritsu was inside.
"Your belly is so big." commented Tsumugi.
"Would you like to make it even bigger, Mugi-chan?" asked Yui.
"I would love that!" responded Tsumugi.
Yui grabs Tsumugi's shoulders and her face enters a wet and dark world. Yui swallows her head down and then her shoulders slide between her lips. Tsumugi's body starts to appear in Yui's belly, which is a little cramped due to there already being somebody in there. Yui keeps going, swallowing Mugi's breasts, her stomach and then her hips. Yui slurps up Mugi's legs and then finishes up her feet. Her belly is now twice the size it was when she swallowed Ritsu and her shirt has started to rip apart.
"I'm still hungry." said Yui.
"I'll go next." offered her sister.
Ui presented her feet to her sister, facing the opposite direction. Yui grabbed them and started swallowing. She soon swallowed up to her sister's knees and then worked her way up to her hips. Her legs made it to her stomach which continued to stretch to make room for the rest of Yui's dinner. Yui makes it past her sister's panties and then swallows past her belly button. The girl keeps going and then swallows her breasts down. Yui makes some more slurps and then sends her sister inside. With her belly three times the size it was originally, her shirt rips off, and now her pink bra is exposed.
"I want inside next!" exclaimed Azusa.
"Come fill me up, Azunyan~!" exclaimed Yui.
Yui ran over to the girl and dove into her mouth like Ritsu did. This time, Yui wasn't even surprised. She was just happy to have food that was as eager as Ritsu was. Yui swallowed her head and then swallowed up to her shoulders. With some more swallows made it past Azusa's chest and then worked on her bare stomach. Yui kept on going, getting her panties to slide into her mouth. Azusa's upper body had reached Yui's stomach, which continued to expand to make room for her. All that Yui had left to swallow was her legs so she kept going until all of her was inside.
"Time for dessert." said Yui, licking her lips and looking at Mio.
"Y-yeah, time to eat me." responded Mio.
Although hesitant, she walked over to Yui, whose mouth was opening wide. Mio slowly and gently placed her head inside the girl's mouth and she began swallowing. Going down, Mio didn't like the smell, but she was surprised that she liked how it felt. There was just something enjoyable about getting this warm slimy feeling all over her body. Yui swallowed her head and shoulders and then her boobs entered her mouth. Mio felt Yui's saliva get all over her boobs and she was uncomfortable with how much Yui was tasting that part of her body.
It still felt good being tasted, even if it was an awkward part of the body. Yui swallowed some more, making it past her boobs and onto her stomach. Mio felt Yui tasting her belly button and shivered in response before Yui moved toward the girl's hips. Yui swallowed them down and started working on her legs. Most of Mio had reached Yui's stomach where the rest of the girls were and her stomach was getting big enough to contain all of them. With just a few more swallows, Yui was able to finish Mio up. All of the girls were inside of her, although it was a bit crowded.
"Thanks for being my dinner, guys." said Yui.
"No problem, Yui." responded Ritsu, "We love it in here!"
"It's a little cramped, but it's nice and warm." commented Mugi.
"We can't wait to get digested!" exclaimed Ui.
"I didn't know being someone's dinner could be this fun." said Mio.
"I hope we all go to the right places." said Azusa.
They talk for a bit and then Yui's stomach acid starts bubbling. It begins to rise a bit and the girls inside notice how good it feels on their lower bodies. By the time it goes past their belly buttons, digestion kicks in harder. The walls of Yui's stomach squeeze around them. At first, they're a little uncomfortable with how tight it is, but they all manage to relax. Their skin gets even softer from sitting in the stomach acid and they're all ready for Yui to digest them.
"Are you ready?" asked Yui.
"Yes!" exclaimed Ui.
"This is it, we're really getting digested!" responded Mugi.
"Yeah, this kinda gross." commented Mio, "But… I guess I'm looking forward to it too."
"It feels so good!" responded Azusa.
"Getting digested with my friends… this is the best day of my life." said Mugi.
Yui's stomach began rocking them around. The movements of her belly made them feel sort of like they were on an amusement park ride. The only real differences were how much slimier Yui's belly was, how little room they had, and the fact that they were getting digested! Acids dripped off of the walls of Yui's stomach. The girls soon noticed that they were getting covered in the stuff.
Acid got into Mio's cleavage and it became clear that her bra was almost done. The rest of the girls had their underwear suffer a similar fate. They were all forming holes due to being exposed to stomach acid, but the first to lose her bra was Mio, followed by Mugi. As more of their underwear digested off, the easier it was for their bodies to digest. After being rocked some more, they all soon find themselves submerged by stomach acid.
They all last a little while longer before losing consciousness. As they digest, pieces of their bodies mix together and their broken forms gather at the bottom of Yui's stomach. After their consciousness was lost, Yui's belly was still pretty big, having eaten multiple people. She just went on with the rest of her night, continuing to digest them until they were gone. When they were done, Yui would have to take one of the biggest shits she'd ever have to take.