Nepeta always loved Karkat...
...but Karkat loves Terezi...
It was just that, a very unrequited situation that no one understood, Nepeta kept her flush crush on Karkat as a secret that not even her moirail Equius knows, things were easy to say back before the game, but now in the Veil, after the game it is even more harder to speak to Karkat, seeing him more around Terezi breaks her heart even more.
But what did Nepeta did not know that Karkat and Terezi's relationship is in a crisis, for Karkat it is a bad sign, his mistake of sending mixed signals to Terezi confusing her with both red and black advances made her concern about their relationship to a much complicated one, Karkat will need to fix their relationship fast if he values Terezi's relationship very much and he has to act fast.
Will Nepeta able to confess her feelings to Karkat?
Will Karkat fix his relationship with Terezi?
This is the story of one love triangle that will change something for the better or worst.