2girls, :d, bangs, black_hair, blue_sailor_collar, blurry, blurry_background, closed_mouth, depth_of_field, eyebrows_visible_through_hair, hand_on_another's_shoulder, happy_birthday, heart, long_hair, looking_at_viewer, multiple_girls, open_mouth, ponytail, purple_eyes, red_neckwear, sailor_collar, school_uniform, serafuku, shirt, siblings, sisters, smile, twins, upper_body, white_shirt