After the collapse is the successor of the main line, after the end of the big collapse. The post-collapse book occurred in 2028, and the main line of the collapse began around May 20 17, and now it is about 20 18. So the post-collapse occurred after the attack on Destiny Headquarters 1 1 year.
Bud coat is the same person as the main line, except that the bud coat of the main line is now 2 1 year, and the collapsed bud coat is 3 1 year.