Twin Paradox Slayers (Fairy Tail FanFic)

If don't know the theory of the Twin Paradox Slayers I'll give you a brief, Sting and Rogue are actually the sons of the two Dragon Slayers they admired as kids, Natsu and Gajeel. They were sent into the past for unknown reasons and lost their memory in the trip. In this story we explore the unknown reason and find out what Sting and Rogue's mothers think of the situation.

It been years after the whole Zeref battle, now everyone was happy. Except two Dragon Slayers , the guild master of Sabortooth, Sting, and guild member, Rogue, have been having such bad dreams. They were always the same, a battle against dragons. What will they find when they start digging??

Shipssss yes they're ships in this.
Obviously, NaLu and GaLe but there will also be StingYu and RoKa (mainly cuz Stingyu is my otp)