My Little Killing Machine (NightInk and ErrorInk)

! Updated Desc !

Dream finds Ink suspicious due to his strange behavior. He investigates it and raged with anger through his soul after finding out he cares about other sanses than them, the Star Sanses. Which leads him to confronting him, but also hurting him.
Ink changed his identity after the argument, which led him to "accidentally" join the Bad Sanses and take revenge. He is no longer Ink, but Dark.
Error and Cross found about this and started to interfere.
They both wanted their cheerful and loving Ink back, even if he was annoying.
Nightmare on the other hand, is finally successful at having Ink on his evil hands and also can't help but fall in-love with him.
But what will happen next? Will Error or Nightmare receive the love of Ink? Will Ink be saved, or be captured once again? Will I finish this god damn story for once without being lazy? (kidding xd)
Cover is made by me. Thank you for support!