Rule 34 Dev - 1girl ahoge arms_behind_back blue_eyes blue_hair blue_hat blush dress hair_between_eyes hat highres large_hat long_hair looking_at_viewer open_mouth otomachi_una otomachi_una_(sugar) sailor_collar sailor_dress simple_background sketch solo tenpibo_ramune very_long_hair vocaloid white_background white_sailor_collar|21565789830