2girls, ^_^, bangs, blonde_hair, blush, closed_eyes, dress, field, flower, flower_field, frilled_shirt_collar, frills, grass, hand_in_another's_hair, headwear_removed, laughing, lying, multiple_girls, no_hat, no_headwear, on_back, on_ground, one_eye_closed, open_mouth, purple_hair, red_eyes, rotational_symmetry, short_hair, siblings, side_ponytail, sisters, smile, upper_body