Story & art by Kakeru Kakemaru (@pekeuu). It is currently being serialized in CoroCoro Comic as of January 15th, 2026. The manga is gradually free to view online, but the current two chapters will be paywalled. I currently cannot read it perfectly, but the gist is that there are two worlds of Omote and Ura (literally: Front and Back) that can be flipped via small coins. Ratty seeks freedom from that world and breaks into our world. He finds himself trapped within a coin and is found by a human boy named Manato Urakaze. When the two team up, they find that people around them are starting to act strangely when they encounter their own BaribaCoins. Through BariBattle they hope to discover the secrets of these coins. It'd be neat if this gets turned into an anime someday so I can see the scenes and characters animated!