Board Thread:Manga/@comment-5774380-20160609000528/@comment-27702860-20160616120147

Tausendberg wrote: Or even in this page, what the hell are those XO looking things supposed to mean? This: オ

Which is "O" and I believe the translaters simply put the "O" next to it so we understand that "オオオオオオオオ" means "OOOOOOOO!"

--J.D.