By Mistake (Levi x Reader)

(Y/N)'s apartment neighbor, Ymir, throws a party. (Y/N) declines the party, mainly because she doesn't want to leave her son, Adam, all alone. After the party, a man named Levi Ackerman (who lives across from (Y/N)) accidentally enters (Y/N)'s home and falls asleep on her couch. The next morning, he goes back to his home and accidentally leaves his wallet. (Y/N) goes to return it to him, but finds that Levi is in a fight with his ex girlfriend, Petra. To shut Petra up and make her leave, he does something unexpected.