2girls, age switch, aged down, aged up, back-to-back, black skirt, blush, border, closed mouth, crossed arms, hair ornament, height difference, jacket, long hair, long sleeves, looking at viewer, multiple girls, outside border, pants, pants under skirt, pink background, pink hair, pink jacket, pink pants, pleated skirt, school uniform, serafuku, short hair, siblings, sidelocks, sisters, skirt, smile, track jacket, track pants, turning head, v-shaped eyebrows, white border