In fact, they were originally two ships in the undercurrent leading to the depths of the body. They echoed each other's perceptions, were entangled and shared weal and woe. They were implanted in the same warm inner chamber and depended on each other. They evolved and grew in the increasingly obscure womb, and were born at the same time. Finally, they became independent individuals, but There is no way to get rid of the inherent involvement, as if there is some kind of special signal, mixed in the blood, no matter how strong or weak the attraction is, it seems that there is a strong desire to pull them back together, to join them together, to melt, and to become one without being able to breathe...