A dog becomes a five-year-old girl and suddenly all her worst instincts are legal problems. Woo-Ri spends eight episodes learning that raising a human is just raising a puppy with thumbs and zero impulse control. The joke never gets old because Maru doesn't either, she stays exactly as chaotic as she was on four legs, except now she can open doors.

Woo-Ri's five-year-old poodle mix, Maru, turns into a human girl of the same age. Woo-Ri goes from pet owner to big sister, and keeping Maru out of trouble falls to her. Maru is still as curious and playful as a puppy, but now she can visit grocery stores, attend kindergarten and grip things with her new thumbs, and she loves being human. The result is a short, lighthearted slice-of-life comedy about their everyday life together.