You and dazai are close friends, you both work at the "Armed Detective Agency" since three years. Dazai and mostly all other members of ADA are an ability user meanwhile, you are just a normal person

But one dark night, something changed. You got onto a special ability by an unknown liking. You woke up the next day only to find out you could read minds, the only rule was that you must be very attached to them

you kept this a secret that you could listen to everything dazai thought of