Judging from the first picture, in fact, a black slim dress is put inside, and the skirt must be shorter than the coat. Here are stockings, which is a classic collocation and looks very delicate.

At the second stop, white Mao Ni top with black tits skirt is a common OL style, but in order to look less serious, you can choose this picture, with loose skirt and upturned edge, which is a bit playful and cute, and the hip skirt looks too professional.

Those who like to keep warm can choose this Korean collocation. Personally, I don't like big red and purple, and the low-key connotation is the truth, which will make people feel more comfortable. You can wear a casual high collar, and the colors are light gray and light brown. And wearing white tights looks casual and generous.