User blog comment:Tetsuya Ookami/Potential MMO?/@comment-4547267-20130604064523/@comment-9339850-20130604073818

no the only reason the series is "dirty", as you put it, is because Issei is the main character. In an MMO since there is no Main Character per se, the game doesnt have to even encorperate anything that would be considered adult material, that is if they wanted to make the game all ages, but if it was rated Mature(or the equivilant outside of the US) they they could definitely keep the adult themes