That day (a Nalu fanfic )

"Lucy , I'm sorry." Natsu plainly says the hot tears streaming down his face turning cold on Lucy's flesh.
Lucy moved her hand to Natsu's head, a sigh filled the blank air coming from the broken rib girl.
"Natsu ... I" lucy spoke.
"No!" Natsu angrily spoke " it all my fault!" His sobs became more violent.
"You didn't know ... You couldn't know."Lucy gasped as Natsu's hug become a squeeze.
"E.N.D..."