Book two to Finally with you Again. After Lucy dies, Natsu is left on his own with the two kids, Nashi and Lucas. But he soon meets someone new, who decides to help him after learning about the ways they're living. After a while, new feelings start to form, making things more complicated for Natsu. Will he be able to move on? Or will Lucy be the only one he could ever love? (I do not own Fairy Tail)

Fairy Tail