You didn't know why, but ever since your father came back from work a few days ago, you couldn't help but sense something off about him, and you weren't the only one. Even your older brother Hayato also felt the same way.
Since then, you two have constantly been spying on Kira, waiting for him to slip and give you two proof to show to your mother. Your actions didn't go unnoticed by Kira, who continued putting on the act of being you and Hayato father.
The very father of you and Hayato, Kira, had murdered and took the identity of, all with the help of his stand Killer Queen. Kira had only done this to secure a quiet, peaceful life and keep his bizarre interest behind close door. Poor Shinobu, the mother of you and Hayato, was unaware of the dark truth that her real husband had been killed and replaced by Kira.
Kira would find his day driving to pick Hayato up from school after already picking you up. Kira practically feel your eyes digging into the back of his head, no doubt still very, very paranoid of him for a 9 year old boy like yourself.
Kira would decide to cut the tension, as he would question you about your day while keeping his eyes on the road.
"So, how was your day at school? Did you do anything interesting?"