In the Japanese anime "UFO Ultramaiden Valkyrie", Akina Nanamura is a character who is very insecure about her flat chest. In this episode from the second season, the character of Hydra makes a wish for Valkyrie to cause Akina's breasts to become very large. And they do. For a while, anyway.
[UFO Ultramaiden Valkyrie - Season 2 