Thanks for playing the game and I am glad you liked it. Currently the game is not meant to be "play" yet as there are no proper gameplay flow. The part where you go to class and cafe it just part of the experience. The current state of the game is letting players see what this game will be about and see how much interest people have.
As for how to brainwash the targets u press this button to put the Halo on them. The button only appears after you have talked to them once.