I Am a Teacher in Honkai

My name is Wu Ye, a transmigrator from beyond the world. For unknown reasons, I came to the Honkai world, where I encountered the arrival of the Herrscher of Thunder. Just as I was on the verge of death, being corroded by Honkai Energy, I was saved by a Valkyrie from St. Freya Academy and became a teacher. Wu Ye discovers that his identity is far from simple.