Some Nightmares Never End(Mephiles X OC)

"I did it again can you blame me? Once bitten twice shy doesn't quite apply. Something's in the air, I can taste it. The tension's building. Then our eyes meet, and the world comes crashing down all around...me!"-A cover of Oops!...I did it Again by Reinaeiry. By the way, this story is named after a Little Nightmares II song called Nightmares Never End; cover art is a commission from Kammib on Fiverr!

Abyss, the daughter to Dark Gaia, has always found herself lonely even after befriending Sonic and his friends after when her father returned to his peaceful sleep. It's true that she would still remain and ally to them whenever needed, but she still would continue spying on Sonic and the others ever so often. She is still pursuing her duty in bringing the world down to darkness, but even with her duty in mind, she still feels alone despite having Lucius, Light Gaia's son, talk to her sometimes.

During one of her spying sessions, she happens to find a cave with a weird and eerie aura to it, as well as finding a strange figure sealed away in a crystal at the heart of the cave. After accidentally releasing the figure, Abyss comes to terms with the being as Mephiles the Dark, who happens to have no memory at all. The two become close, and soon lovers.

When an encounter with a being Mephiles somewhat recognizes comes into play, Abyss is driven into an adventure that talks about the past, present, and future, hoping to help Mephiles and this being recover their memories. With Mephiles now being her lover, how can she convince him to not be destructive again?