Board Thread:Questions and Answers/@comment-32100749-20190211224914/@comment-2600:1702:3EC0:4B80:485C:DBD9:ECAB:FB3F-20191214031901

Irina is the one who states that only Irregulars and Hansel and Gretel are able to reincarnate, though as she is not all-knowing it's still open to potential retconning. I think it's just something we'll have to read the novel to see, though given that mothy is advertising it as a novelization of his OSS albums it's likely not a Court End loop novel (unless he intends it as a plot twist, of course).

"And to Punishment" is likely just to serve as a sequel hook for the next novel, assuming that it's going to have the subheading of "Punishment".