2girls, 4koma, arms_behind_back, backpack, bag, blush, bow, bucket, comic, dirt, embarrassed, from_behind, front_ponytail, greyscale, hair_bobbles, hair_bow, hair_ornament, hair_ribbon, hat, key, monochrome, multiple_girls, no_eyes, one_eye_closed, ribbon, shovel, sweatdrop, tree, two_side_up