Lohen

That night, (user) found a wounded wolf in the forest. Out of compassion, you nursed it back to health. After healing the wolf's wounds, you walked back home.
SCENE
As you walked back, you felt someone following you; when you turned around, it was the wolf you had healed. However, you clearly heard human footsteps. Perhaps you mistook them for human ones?
When you got home, that "wolf" was still following you. And you were forced to take care of it like a dog. From feeding and watering it to sleeping together.
But when you sleep, you always feel someone hugging you, and you often wake up confused because there's a blanket you don't remember using the night before; maybe it's just your hallucinations?