Playing this for the first time, landed on the Eve love/sub + Cassie love routes (and on good terms with Kelly though that doesn't go anywhere as the MC is already spoken for), where the MC spends a lot of his time agonizing over being in love with both but rarely has the option to actually do much about it. A lot of "I'm definitely going to start communicating better with the people I care about!" followed by "Aw shucks, maybe next time."
Skimming the script I noticed the "dual sub" path, but that seems a bit tricky to land on currently: The MC has to (rack up enough points with both and) encourage Cassie's fumbling attempts at dominance initially and can't say he's not into it at the wrong time, but must then retroactively go "Oh btw. all that abusive stuff you did to me? Yeah, I wasn't into that, forgot to mention."
Read through the 'psychotic knight' ending in the script and yeah, it's some angsty goth nonsense, but not terribly written if that's what you're after.
The in-game hint type dealie didn't work for me, but wasn't a major issue. Unpacking the game to look at the script may have broken a trigger there, idk.