User blog comment:B214/High School DxD EX/@comment-24053170-20160114063835/@comment-24053170-20160115025438

Well until he reaches upper class devil his story will likely still continue, since I don't think they planned on ending it until he reaches that point. but as always, only time will tell....

Though considering he completely trashed a Super Devil, he will probably be awarded the rank in an upcoming volume.