At the beginning of KMIYC, I think it was chapter 2? There was a newspaper article about a prosecutor who won a big case. The secretary of the security firm Josh works for talked about how handsome he is and how this could be a beta. That is Chrissy Jean, a beta and the mc of RAIYC.
Grayson later mentioned when he was bothering Josh with his doubts of him being a beta, that a prosecutor who is a beta won a case against Nathaniel.
RAIYC takes place around the same time as KML and KMIYC.
Chrissy Jean also appears in the epilogue of DMIYC.
By the way Chrissy Jean is 180 cm tall.....and Nathaniel 218cm.

╮( ̄▽ ̄)╭ cant wait for the next novel of this universe