What if your dog suddenly turned into a person one day? What sounds impossible has become reality! 'Woori', the head of a one-person, one-dog household, works hard to earn money for his dog Maru's food, who is like a younger sibling. On the night a shooting star fell, the next day, a cartoon-like situation unfolds for 'Woori'! It's a chaotic daily comedy sitcom with 'Maru', who has become a 5-year-old child, and 'Woori', who is experiencing real parenting for the first time, along with the residents of 'Rainbow Villa'!