"Senior Brother Chu Zihang, keep your words and hide your heart, how much regret do you have to pillow to get a good night's sleep?" "Headmaster Angers, how heavy is it that you have been burdened with a lifetime of hatred? If you are given a big hug, will it dilute your sadness a little? "What about you, Eri? The story says that you are a witch-like girl, you must be beautiful, the kind that can make me addicted to you. "I want to see you!" …… A cycle of nightmares about the future made Lu Mingfei cry all night with the quilt, and the tears of sadness seemed to drown the world. There are 3,000 knives in the world, and remorse is the most murderous. The tears that were braver than the rainstorm finally completely poured through Lu Mingfei's stagnant life, and also drenched the cowardice he had hidden in his bones. Kendo, Knowledge, Strength...... The boy will hold everything firmly. The gates of Kassel are wide open, and the train of fate is sounding its horn and heading to the other side, this time the dragon slayer boy is determined to raise his sword to protect his girl and cut off all regrets!