One More Day [ERERI/RIREN]
Groundhog Day AU/// Levi owes Erwin a favor, and to his annoyance is called into town to teach a bunch of snot-nosed brats something as elementary as physics. A few cruel words and and a set of disused manners later, Levi finds himself waking up to a Monday... Again. As the days and months and eventually years go by, Levi begins to change- using his manners naturally, helping others without hesitation, and spending more time around the boy failing the class.
~I own nothing from snk~