So... I just noticed it...
In another manga called tomodachi game, there is a method to make people listen to what you say, and that method makes those people view you as someone amazing. This is basically mind control.
Step 1. Help that person with choosing something not really important, and show them that your decisions are great.
Step 2. Help them with something more difficult, and this time make sure that your decision not only helps the targeted person, but also someone else close to the target
Step 3. To make sure, keep giving them decisions that help them, but you can also start choosing things that help you
Basically, this way you make people depend on you. This only works on people, who want to look good in front of others. If you make a mistake, they might notice it and understand, that you are not really that good at making decisions and the mind control will be over.
This manga shows the same damn thing