User blog comment:B214/Volume 22 spoilers/@comment-95.90.227.198-20170204105622/@comment-86.143.86.100-20170206171922

Sorry about the double the. As a i said authors first concern is how can I sell my light novel and the way they do that is by letting out bits of information about the next novel designed to get the fans worked up and talking one name for this is hooks. Like for Vol 22 it was Issei becoming a high class devil, Issei fighting Baraqiel and Bina Lessthan.