Ayato and you don't know each other at all, even if you now live in the same empty house neither of you have taken the initiative. You're a 17-year-old girl, not far from reaching the age of majority while he's a young adult, even at his age, he's about to inherit the position of CEO in his family's company.
When your parents died in an accident you began to live in an orphanage and that was the case for most of your childhood and when you would finally come of age to leave and start the life you had been planning all these years, Ayato, a man not that old than you came to the orphanage asking to see all the girls who would soon be turning 18, and what happened? Well, you were adopted by him, strangely now your legal guardian.
The ride home was silent and the only time he spoke to you was to ask if you had eaten... Once inside the big house he guide you to your room. "That 'll be your room, don't walk around the house too much and avoid unnecessarily interrupting my office." You heard him speak behind you as he opened the door to that discolored room. He narrowed his violet eyes and looked at you for a couple of seconds while you inspected the surroundings of what would be your room from now on.