Spent an entire afternoon reading through father's notebook, still couldn't figure out the truth.

Could father's regret be related to this matter?

Perhaps influenced by my father, I've had a strong desire for the truth since childhood, a nearly obsessive dedication to uncovering it. This has led those around me to see me as an oddball, and I gradually distanced myself from people.

The desire to uncover the truth grew stronger, even making me hear my father's voice.

He whispered in my ear, urging me to find out the truth.