Nobody's trying to sell you on this one. It's a show about two cats learning to be princesses, which sounds disposable until you realize it's actually a 39-episode argument for gentleness. The pacing moves at cat speed, which means it earns every quiet moment and never pretends chaos needs to be dramatic. If you've been watching anime that demands something from you, this one just asks you to sit still and watch two idiots fail at etiquette while someone patient tries to teach them anyway.
CoCO and her sister NiCO are two cats in training to become graceful, elegant princesses. The lessons do not always go smoothly, because the pair has a real fondness for pranks. To keep them on track, a cat named Lady Oppenheimer looks after them every day. She is strict but also caring, and the two sisters keep her very busy as they do their best to learn how a princess should behave, slipping in a bit of fun mischief along the way. The episodes are short and set in a fantasy world.