1) The Miracle card and book tied the two brothers together. It was the way that KKJ would return to his original body. But the children ripped it. 2) SYJ was aware of everything that happened. That is why his heart rate went up when GDR said she loved KKJ and when she returned the ring. It stabilized when KKJ came to him. SYJ was aware of all: that KKJ was born to save him, and that he also truly loved KDR. For both of these reasons, SYJ decides to let GDR go, for her and his brother's happiness. This happens when SYJ in KKJ's body, sheds a tear. 3)After waking up, KKJ and SYJ find that their bodies have not changed back. KKJ has all his memories (he passes by his old house). They decide to keep it a secret, and pretend that they do not remember anything. That's why even MaRi says they can't remember. KKJ is testing GDR when he is a little cold at first. 4) KKJ gets an old body, and in return gets GDR. SYJ loses GDR but instead gains a younger body, without the disease that his original body had.