Holy Moly. Reading so many game threads on this site, it's clear to me that tags like 'Netorare', 'Swinging', or even 'Voyeur' aren't cutting it. Many people simply don't want other dudes having sex with the MC's sexual prospects, regardless of the emotional context. I can't imagine it would be hard to add a tag that's clear about the inclusion of other peoples' penises...
Not everyone is down with OPP.
If that's what you're into, right on. I'm not but that's why we search different tags, baby. Maybe some day we'll get a tag for Non-MC Intimacy. NMI? Eh... Whatever.
Game looks hot. If there's ever a build without OPP I'll be back FO SHO.