User blog comment:FrankieX98/The future members of the Issei's harem and peerage./@comment-2601:584:C400:82A0:C861:CFB9:7C8:845C-20181206200804/@comment-36663391-20181207140042

Maybe Issei before figth Balberith will defeat Tartarus and Eruberus, also I think that Vali vs Sun Wukong can happen in a volume like DX. Vali vs Tobio should be happen into a volume of regular series because for me is very important.