Stores hire buyers to pick out what will get "bought" and then sold out of the collections. I'm sure there are plenty of cases where the owner has input as well in smaller operations.
Keep in mind this is their first season carrying this stuff. It's a brand that is very hyped but has little distribution outside of Japan, so they bought a combination of things they know will sell easily (socks, scarves, and hats in trendy but distinct fair isle), and some outerwear that is on the conservative side. While their photos online don't do a good job of presenting the product the 2 jackets are things that will blow you away in person, even if they are a little tame by WM standards. Everything they produce has soooo many little details that just add up into an incredible product.
The way they represent/model their clothing is completely off from the way most people would wear it. I've glossed over many a thing on Context, while somewhere else it would look great.