This is the 2nd version of the Byway Secret series. There are2 rooms inside, and you'll be able to open the 1st room soon. But, it takes 10 moves toopen the 2nd room, and you'll miss your way to open. The right side and the reverse sidewill intertwine and move each other. It was made with a new mechanism that is anapplication of traditional Himitsubako's bar device. The difference between yellow one andred one is only the color of inlay on surface. They have same mechanism.