Girl blackmails supposedly younger genius teacher boy with a classic pic. Kinky things happens.

Surh Jung-woo developed Gynophobia because of his trauma when he was younger. Even as a college student he is still afraid of woman, but Yoon hae-soo is a angel like existence for Jung-woo because of his fear. He starts dating after thinking he could trust Hae-soo, but while putting everything he has on line for her he falls into debt and gets cornered. After he gets betrayed by Hae-soo the person to save him is the most beautiful girl of this college, and the famous professor Pi Eun-na. What is this beautiful teacher after, and why did she help jung-woo?