Starry Night works for Equestria Railways, mostly being assigned to the Manehattan Area Rapit Transit network (MART). After seeing his friend Rarity start a blog to connect with others about her passions and working life, he decides he should do the same... with a little bit of affectionate prodding from his wife along the way.

Based on, and occurs in the same world as, Rarity's Blog on Life, Fashion, and All things Fabulous, by the marvellous My Little Pastafarian; https://www.fimfiction.net/story/478041/raritys-blog-on-life-fashion-and-all-things-fabulous