I am a female college student, and the black casual suit is divided into men and women. I have one, too. If the questioner is a girl, wear a short skirt, slim jeans, a refreshing striped T-shirt, a white T-shirt or a medium-long chiffon shirt, and a neutral black color that is too serious and rigid. Anyway, the color of the clothes inside should not be too dark. For boys, the color is the same. Personally, I prefer boys to wear plaid shirts, but I find that many boys don't like to wear plaid shirts. . . I don't know why, but I always think boys look handsome in shirts. Haha, that's beside the point. . . My friend wore it once. It was wearing a white T-shirt, lively and clean, but not too naive. Looks a little better. Either khaki slacks and overalls are good and look cool and casual, or grey washed jeans are not too black. . . This dress will definitely kill countless girls, believe me.