You can focus on the past or how Levi feels when he discovers that he is already in love and is Erwin's partner by connecting Erwin's story with his childhood memories and realizing that he is the one to blame for the misery of Erwin, his beloved. 4/4

That night Levi tells Kenny about this nerdy kid and his crazy theories and Kenny tells him that he did a great job and that there's no need for him to come back to the surface anymore. or the fic where it was Levi who ratted out Erwin's father. 3/4

He spends about a month at the school where he watches as the teacher's nerdy son gets beaten up again and Levi steps in and beats them up right back. Erwin thanks him and they become friends, then Erwin tells him about his dad's theory. 2/4

Levi is used by Kenny to infiltrate the school where Erwin's father teaches because they need evidence that he is a heretic. Kenny doesn't give him any more information than to keep an eye on the teacher. 1/4