I ran a Naruto Esq D&D campaign for 3 years a while back, and one of the main NPC's everyone loved was Chikan Kokoro. She came from a strange clan of ninja who had eyes that could mind control and hypnotize people. She was a busty lil' ninja, but honestly didn't eat too much save for a time when she couldn't stop eating magical honey. Each love Ninja has a Shinkai Gattai, or a God soul combination, which is a person they are destined to be together with.
Anyway, this was something I just doodled back then because I wanted to draw her fat. The synopsis here is that Okibi, her boyfriend, thinks she's cute chubby AND wants to make her boobs even bigger. She however thinks she's getting chubby so she wants to work out to try and lose weight, so Okibi starts convincing her that she needs to eat way more and drink huge protein shakes. She starts eating more and drinking huge shakes multiple times per day and starts getting fatter. Okibi says it's normal for someone to gain weight when they work out because it means she's getting more muscle, and after a while she starts to notice that maybe she's being lied to a little.