A joint structure is used for the noisy hardbait mounted on the bug cup. The two bodies connected by a joint interfere with each other and invite catfish with a unique sound of "Kakokako". In addition, due to the synergistic effect with the bug cup, the joint part firmly bites water and supports a wide range of speeds from slow retrieve to fast retrieve. Achieves a stress-free usability in all situations from water stagnation to torrent, upstream to downstream. Furthermore, we thoroughly researched the "bad hooking up" that can be said to be an issue for catfish games. We are particular about details such as body shape and hook position, and it has become an item that boasts an outstanding hooking up rate.