Levi x Mikasa - Wake Up Call [Rivamika Fanfic]

After loosing her parents in a fire Mikasa is sent to live with a distant relative. There, she meets Kenny and Levi( who becomes her new 3rd year homeroom teacher). Despite Levi's age difference, Mikasa develops a fondness for him, moreover a crush. One day, Kenny will leave them to look after his home while he's away...