After an interview with a news anchor, female college student Kanna Seiyama assassinated her father, a famous painter. Because of her good looks and the sentence she said after being arrested, "Find out my motive for murder yourself," the media continued to exaggerate and report why a daughter with a bright future would kill her father? Why didn't even she understand the reason? At the same time, clinical psychologist Yuki Makabe was commissioned by a publishing house to write a book about Kanna Seiyama's story, so she began to study the incident. A foxy girl with a complicated relationship... When the people around her testified clearly about Kanna's suspiciousness, Yuki discovered that there was a key missing memory in Kanna. If she finds the first love in her memory, can she solve the reason for her father's murder?