Ripped to Shreds

Mangled, torn, split, flesh. Running in messy, jagged lines of five down his back. There were deep, brutal chasms cut into his skin. It was horrible. She let out a small cough of shock, turning into a teared-up choke of guilt. Those were her finger marks. Her hands did that to him. The guilt layed further thicker when she pushed him all the way over onto his front. She scrambled over, completely forgetting about her own pain. In the middle of one of the largest splits, caused by her right index finger, something curved and pale was cemented into the thick scab. She shook her head in quiet denial, before lifting her right hand up to her face. Her worst fears were confirmed, a tiny sob fell from her lips. Most of her fingernails were ripped clean off, replaced with scabs. But it wasn't Natsu that tore them off, not directly. Her right index nail was lodged into the meat of Natsu's back. Clawing at him, it was clear that's what she'd been doing. Where were the rest of her missing nails? Buried deeper under his skin she supposed.

An excerpt and the summary from the AO3
The cover is NOT my art and a cover is being made by the original writer and co-author