June, X779.
Fairy Tail School, Erza patrolled the training grounds as the teacher on duty.
Ever since Crawford stepped down, Allen had ordered Erza to come back and rest for a while. After all, once Allen rarely went out on missions anymore, Erza had become Fairy Tail's current champion of destruction.
Whenever Erza went out on a mission, houses were often cut in half, or entire towns suddenly became two pieces. Most of the previous complaints had been about Erza as well, so after Yajima warned Allen, Allen dragged Erza back to become a teacher, claiming it was to help her cultivate her character.
But looking at the people in front of her, Erza felt her blood pressure shooting up.
Sunlight streamed through the mottled leaves and spilled into the classroom. Natsu, Gajeel, Gray, and Lyon were furtively sitting in the back row.
They carefully stood their books upright, as if those thin books could build an indestructible barrier to block Anna's gaze from the lectern.
The four of them smugly hid behind this "defensive line" and began brazenly fooling around. Sometimes they whispered and snickered together; sometimes they played pranks on each other, enjoying themselves immensely. Yet they had no idea that every move they made had already fallen into someone's eyes.
Just as they were immersed in their merriment, Gajeel, relying on his keen instincts, was the first to sense a hint of danger. The oppressive feeling surged toward him like a raging tide, making even this normally fearless man feel afraid. He abruptly raised his head, wanting to find the source of that chilling presence.
The instant he looked up, every hair on Gajeel's body stood on end, as if he had been struck by electricity.
Erza had appeared beside the window of the back door like