2girls, blue necktie, blue sky, blush, brown hair, closed mouth, cloud, cloudy sky, contrail, day, grey skirt, grey sweater, holding another's arm, long hair, long sleeves, looking at viewer, multiple girls, necktie, open mouth, plaid, plaid skirt, pleated skirt, school uniform, shirt, siblings, sisters, skirt, sky, smile, striped necktie, sweater, swept bangs, twins, white shirt, yellow eyes, yellow sweater