The main winter uniform consists of a long-sleeved dark blue blazer over a long-sleeved white dress shirt and a blue pleated plaid miniskirt with alternating blue and light blue stripes, including a red stripe near each fold of the skirt. Sonoda Umi wears the vest from the summer uniform underneath her blazer while Yazawa Nico wears her signature pink cardigan underneath the blazer.
The summer uniform replaces the blazer with an beige sweater vest, and the white shirt now has short sleeves. The vest is sometimes not worn as in the case of Hoshizora Rin. Meanwhile Nishikino Maki has a different gray vest for the summer uniform and Yazawa Nico wears her cardigan instead of a vest.