Feral Requiem: Dog Reincarnated as a Human

The story starts with a hungry, homeless stray puppy fighting a death battle with a wild wolf to end his 7 days-long hunger. When the puppy was about to get killed, a mysterious girl saved him. Then she gave him food. She was also living alone in that forest. They started living together. They were hunting together, sharing food, and glazing stars together. Peace never lasts forever. One day the girl got kidnapped and the puppy tried to save her creating an opening for another unknown ally who saved the girl from the kidnappers. Unfortunately, the puppy was slashed into pieces by the swordsman of the kidnappers right in front of the girl's eyes. Then the puppy got reincarnated as a human in the same world.