A system partner is when someone dates a system, and the systems alters can only date that specific person. Other systems can be system partners but also singlets
A system partner is when someone dates a system and all of that systems alters don't date anyone except that person. Other systems can be system partners but singlets can also be system partners
"___ is my system partner, not all of us date them but we wouldn't date anyone except them"
"Cool but please let me out of your basement"
"Cool but please let me out of your basement"