Anime: Kiss Him, Not Me
I mentioned in my review that this particular scene was what made me try this anime in the first place. If you don’t know the scene, it’s actually in the first episode where Kae, the main character transforms from being fat to being super slender as a result of her depression. She does not get out of her room and does not even eat for a week. The result of it is very positive though, at least towards her body.