Himitsu ga Akasareru Toki

Jamie is a successful radio DJ with a PhD in human sexuality who answers listeners' love-related questions. To boost ratings, her station arranges a challenge in which she must be seduced by Chase, a top race car driver known for his womanizing. Chase starts pursuing her aggressively, but Jamie avoids his attempts. She is keeping a secret—despite her reputation as a sex expert, she has never been in a sexual relationship.