Loving you (wolf Eren x neko Levi)

Eren is a kid with wolf ears and a wolf tail...he was left an orphan after his parents death by a Titan. Erwin has raised a neko named Levi but he sees Levi more as a friend.People like Eren and Levi don't age after the age 20,but they can be killed. One day Levi finds Eren an takes him in. Levi raises Eren from age 5 to age 13. But one day Levi and Erwin have to go on a mission since they are wings of freedom fighters and have to leave Eren with Mikasa. Eren gets an accident and forgets his memory and starts to believe that Mikasa is the person that has raised him since he was small. When Levi comes back he thinks it's better that Eren forgot him but what happens when Mikasa tells Eren the truth?