All throughout college Eren was taunted by his bully - Levi Ackerman.
Bruised and beat, he lost focus of his studies, and contemplated on whether to come to school or not.
However, to Eren's joy, things slowed down when Levi's sister- or rather Eren's best friend, Mikasa, made Levi regret ever laying a finger on Eren.
Eren focused more on his studies and proceeded in passing with grades better than he thought he could've once achieved.
A few years of peace Eren managed to get a pretty steady job teaching German at his previous school, Sina, but things took a twisted turn when he discovered that Levi was the new French teacher.
⚠ Warning : Does contain violence, self-harm and swearing. ⚠