User blog comment:B214/Season 3 confirmed!!!!!!/@comment-107.10.155.255-20141231191354/@comment-3290441-20150104184143

The trailer clearly shows the sparing match between Issei and Sairaorg which doesn't happen until volume 9, we're starting at season 5 for season 3 eliminating Volume 8 which is full of filler that leaves us with 4 volumes.