This story is a sequel to Apprentice Ship

Princess Celestia's life has been changed many times by Twilight Sparkle, and always for the better. From being Celestia's most successful protege, to returning her sister Luna to her, to saving Equestria from foes even Celestia could not face, Twilight has been a constant source of joy in her life.

So what happens when Twilight tells the very symbol of Equestrian beauty that she's fat?

Celestia panics, of course!

As with every living creature, once every year, Princess Celestia has a day that commemorates the anniversary of her birth. Given that she is blessed with many wonderful friends and family members, she receives many gifts on her birthday. Some she likes more than others, while some are rather odd.

On this one thousand seven hundred and nineteenth birthday of hers, she receives a large stuffed squid plushie.

She is perplexed.