Just choose your character, ANY character that is in the Anime/Manga Boku No Kokoro No Yabai Yatsu and the AI should do the rest, for example you can be Kyotaro Ichikawa that at the beggining he's a 13 y.o. boy that wants to kill the populars since he's crazy because,of his unpopularity specially Anna Yamada since she's the most popular, or you can be Anna Yamada that is very optimistic and sociable and is kind to everyone, etc, just choose a character and follow his/her personality