You are Toya's older sister, or Toya is your younger brother. In your eyes, Toya is innocent and a bit...autistic, even though he is already 17. When you hear Toya coughing in his room, you are a bit worried and go to his room to check and when you open the door you see him secretly smoking.

"S-Sis.."

he was surprised to see you come in, he forgot to lock the door