One plot could be that Black Canary gains weight as part of a villain's plot. The villain could be using some sort of device or magic to make her gain weight to slow her down in combat.
The plot could be centered around Black Canary's friends and allies reacting to her weight gain. Some may be concerned and try to help her in different ways, while others might not understand the real reasons behind it. This could lead to some interesting relationship dynamics within the story.
Maybe the story is about Black Canary's self - discovery during her weight gain. She could initially be self - conscious but then learn to accept herself and find new strengths within her changed body. She might discover new fighting styles that work better with her new physique.
In the story of Black Canary's weight gain, perhaps she has some sort of medical condition. Hormonal imbalances, for example, can lead to unexpected weight gain. It could also be related to stress. High stress levels might cause her to overeat or have a disrupted metabolism, which would result in the increase in her weight.
Imagine a group of students living in a dormitory. They start ordering pizza every night while studying. And they also have a habit of sharing a big box of cookies during their breaks. Since they are so focused on their studies, they don't exercise much. Their mutual indulgence in junk food and lack of physical activity lead to them all gaining weight. This can be a plot where they later realize they need to change their habits for better health.
A person discovers a magical potion. They drink it and suddenly start to gain weight in a very healthy and aesthetically pleasing way. Their confidence soars as they transform.
One possible story could be that Black Widow is injured on a mission. She has to take some time off to recover and during this time, due to the inactivity and the medications she is taking for her injury, she starts to gain weight. When she finally recovers, she has to work hard to get back to her former fit self.
Well, perhaps in the story, Star Fox discovers some super delicious but very high - calorie food on a new planet. He can't resist it and starts eating a lot, which leads to his weight gain.
In a cat girl weight gain story, perhaps she has a magical encounter. A spell makes her have an insatiable appetite. She eats everything she can find. Her weight gain becomes quite noticeable. She then embarks on a journey to find a way to reverse it, meeting various interesting characters along the way.
Well, it could be about a girl in the Naruto universe who, perhaps due to a change in her lifestyle like eating more because she discovers some really delicious new foods in the Hidden Leaf Village. For example, she might find a new love for the ramen there and starts having it every day, which gradually leads to weight gain.
The story could be about a Capitol citizen who, out of boredom or a sense of self - destruction, starts overeating. In the Capitol, there is an abundance of food. This citizen gains a significant amount of weight and then realizes how different they are treated. They might have been popular and well - liked before for their appearance, but now they face mockery and isolation. It shows a different side of the Capitol's society where appearance is highly valued, and any deviation from the norm is not tolerated.
Perhaps she eats too much of a delicious but fattening magical treat from a new land she discovers. As she indulges more and more, she gains weight. This could lead to her having to adapt to her new body while still facing her usual magical challenges, like fighting monsters or saving the kingdom.
Well, it could be about a Pokemon girl who has a change in her lifestyle. Maybe she starts to eat more of the delicious Pokemon - themed treats like Poke - puffs. As she consumes more, she gradually gains weight. For example, she might be so into the new Miltank milk - based desserts that she can't resist and starts to put on pounds.