This is something that popped into my head while I was playing a certain tabletop game.

Tok (First appearance of my sona!) defeats 4 evil food bosses (and minions) to bring back peace. He gets stronger by eating his enemies and gaining weight (also makes him heavy and sluggish).
I didn't want to spend too much time on it, so it's line art quality. Even so, it took about half a day, so I feel like cursing my slow drawing skills.

I'll explain the shenes situation a bit...

1. Tok the snow kobold is, well, a normal adventurer.
He arrives in a new world wearing light clothing that is easy to move in.
He finds himself in an area where peace is threatened by four bosses.
He sets out on a new journey. He must defeat food monsters and the four bosses sleeping in the dungeons!
The reason he looks so cheerful is probably because he has no idea what is about to happen... (or maybe he does?)

2. He wasn't that big of a eater. So he was force-fed by the monsters and looked like he was in a lot of pain.
He couldn't adapt to the new attack methods and was on the verge of collapse. (Actually, he was knocked down a few times.) It seems he needs to train his eating before he can explore the world. But they're actually very tasty, so it seems like it'll be a fun training.

3. A few days passed, and he defeated the first boss!
His body had undergone a big change. His body was now definitely fat. His arms, chest, and legs were all rounded and soft looking. Even when he was hungry, his belly was sticking out proudly, and it shook with every step. And his clothing was noticeably tighter.
His apetite had also grown. With that, more gluttony and gains were waiting for him.

4. This is after he defeated the second boss. His clothes are no longer able to withstand his intense eating habits. His upper arms are sagging and his belly is hanging down to his knees. His thighs are as thick as trees, and combined with his huge belly, he can no longer bring his legs closer together. So he has no choice but to waddle.
He went to the blacksmith to get a new armor. Of course, there was no armor that would fit this body shape, so he had it tailored. He blushed as the size of each part of his body was measured and he was once again able to see how fat he was.

5. This is after he defeated the third boss. He's used to it now. After eating most of the boss, he's gotten bigger and waddled back to town with heavy footsteps. He decided to rest at an inn, probably because he was tired from "walking". He lay down on the bed and felt hungry. He ordered even more food. Luckily, his wallet had grown bigger too, so there was no need to worry.
He ate the meat, sweets, and hearty meals that were brought to him one after another at an amazing speed. With every hard bite, his huge body wobbled and the bed creaked. And his fat belly swelled with more food. It's easy to imagine that the food would be converted into his flesh the next day.

6. Well... I don't think I did well in the 6th one. Like the 5th one, I tried to force myself into a pose that I'm not good at (it's hard to imagine), and as a result, it didn't work out and I had to compromise. I'm not good at unifying his body type, so I'd like you to forget about his size. Eh, you mean, the story? Right, well...

This is the last dungeon. With his footsteps like a roar and his breathing like a storm, he dives deeper. His body, which looks like a sphere and is now as wide as his height, knocks down traps, crushes monsters, and devours all kinds of food. He then faces the boss, but his victory was almost guaranteed.
Rather, what interests him is food. The boss is tastier than any other monster. He eats the boss, using the remnants as an appetizer...eats...eats...eats.... There is no longer any trace of the light weight kobold he once was. There is now an evil dragon that eats everything around it as if it has lost its senses. ...lardball of.
And so, he defeated the four bosses and restored peace to the world. Is this the end...? No, not yet. There is still power he has not yet obtained. He seems to continue this adventure until he has seen everything in this world...
(To be continued.)