Reborn Academic Master: There Is a Small Amount of Money in the Book

When her mother died unexpectedly when she was ten years old, she closed herself off and became a ruthless learning machine. What? In her late thirties, she was actually reborn as her 9-year-old self. When a doctor of medicine came to elementary school, his deskmate turned out to be the cold-faced academic god who competed with him for the top spot in high school. ... Meet Gentle Mother again, investigate the mystery of her death, and rewrite history. I will not let my mother leave me this time... When my mother passed away, all my family members didn't show up. What a cold-blooded father? Mom's ten-year date with him? What is the truth?