Drew this for  elcid a couple months ago.

It had taken a while, but Koyomi was finally convinced by her friends to brave her first-ever dekamori-size meal. Manami and Eiji provided it for her, an enormous serving of udon at their restaurant, and although the rabbit had looked upon it rather fearfully at the start, she managed to eat the entire thing and ended up happily rubbing her nicely bulging tummy. Then she surprised everyone by requesting a second one, and seconds soon became thirds, and fourths… Others watched in amazement as she packed away more and more food, her booty soon requiring extra seats as she became very fat. Even this didn’t stop her, as she admired her swelling blubber and called for more still! Eventually, a couple hours or so later, she decided to stop, but only because she realized she’d gone immobile. She was quite proud of herself, cheering for her own accomplishment, and very much enjoyed realizing what a bottomless pit of an appetite she really had!