2girls, accident, aqua background, aqua hair, arrow symbol, blouse, blue neckerchief, border, closed eyes, closed mouth, collared shirt, green eyes, hands on another's chest, heart, incest, inset, kiss, long hair, looking at another, multiple girls, neckerchief, parted lips, sailor collar, school uniform, serafuku, shirt, short hair, short sleeves, siblings, simple background, sisters, smile, surprise kiss, surprised, twincest, twins, upper body, white border, white shirt, x-ray, yuri