I am looking for a very specific type of story. One in which both parties start thin and get fat under any means necessary. Whether it's magic or just plain old gluttonous eating
I don't care whether or not there is a feeder/feedee dynamic. I just want a good story

There’s “Quaranton” by crudeatoms inches devientart. Starts small, gets pretty big by the end. No magic, but an eventual emphasis on tube feeding, true immobility, and it influencing the other couples around them to gain weight.

Primary gainers are a married M/F couple though, and both parties are given mostly equal consideration

>>3062
I'm not really into immobility. They can be near immobile but no true immobility or blobs