Curse Back: There's Something Wrong with the Teacher's Smile

[Redemption + Rebirth, no cp in the text, the original male protagonist restarts the world and saves his best friend] "Hoshino Hikari, a high-tech teacher of magic and an unknown level magician." "The ability is unknown, the technique is unknown, and the purpose is unknown." The magicians in the college have countless speculations about him. He has no past and seems to appear in this era out of thin air. But in fact, this idiot just wants them to be well. On the rooftop, the red-haired boy pulled him into his arms and patted his back gently, his voice too gentle to be true. "It's time to come back, right? Otherwise, I'll punish you by copying the test papers, Mr. Hisuhito Kizuna." In the teacher's office, he stepped on the white-haired teacher's face and nodded slightly. "From today on, I am a teacher at the Conjuration College." At the entrance of the alley, he hugged him, knocked him out with a punch and dragged him away. In Panxing Cult, he was covered in blood, but his expression was relaxed. And it wasn't until everyone regained their memories that they finally understood—— How much has this young man done? [There will be private settings and a large number of original plots, fried noodles come up with your own ideas, OOC warning, real people recommend to avoid lightning]