The Rulebook

(Idea suggested by Moron)

Akechi was furious as he looked at 'the rulebook'. It took forever to find a palace ruler gullible enough to actually believe the invention existed. Not only that, but he had to come up with a complicated story about how the Phantom Thiefs were using it to change peoples hearts.

That was his mistake.

Originally, the rulebook was meant to be able to change everything. He could write down that the sky was red and it'd turn red. He could write that the phantom thieves never existed and they'd be erased from existence.

Instead of working that way, the rulebook is more like a hypnosis notebook. It can change the hearts of a single person at a time. Make them believe or act in any way he wanted. It was definitely useful. If he wanted to, he could use it to make the principal of Shujin terrified enough. All he'd have to do then is give an order to have Makoto expelled and he'd have his revenge on her.

Of course, that wasn't enough. He didn't want to just make her upset. He wanted to humiliate her. Degrade her. Make the whole world view her as a slut before erasing all the notes on the notebook, setting Makoto back to normal, and leaving her to deal with her regret.

He wouldn't be the one to change her life though. Since the book had a limit of one person, he decided to give it to someone else. Someone that he suspected would use the book on Makoto. Meanwhile, he could put his own plans into action, bringing more inventions into existence to use on the other phantom thieves.