Bring back saito
Saito Akihito was not your typical ordinary teacher, even though he looked and acted like one. At only 28 years old, he was pretty young to be a teacher, and that's why all the girls (and some guys) fell for him. You could bet that he didn't belong there and that he didn't look or act like them. He was different from the person he showed, and he was dark and twisted, but he didn't know that. His other personality did, and his older brother was the reason why he was like this. But let's get into the story.
Saito was sitting down to eat lunch with his best friend, who happened to be an alternative version of his older brother Haturisuke, named Hirotori. Nothing bad had happened, and if you're wondering, Saito had replaced himself in his true world because he didn't want to be there anymore. Their bond was never broken.
Haturisuke somehow knew that this wasn't his true brother Daisuke.
Daisuke: "You sensed that I wasn't your true brother."
Haturisuke: "Where is he?"
Daisuke: "He made a wish that he could be born someone else because some fucking idiot ruined their promise."
Haturisuke: "Can you bring him back?"
Daisuke: "No, Saito is happier there. He is at peace, and his family and brother love and care about him. You can't really bring someone back unless they want to come back. He's pretty well known there."