He had been seeing someone and now was in the house of someone he only knew liked books and whose first name was San. -A Cup of Love Choi San, the head of a major South Korean corporation, runs a unique company: A.S. Ent. employs assassins. The company is notorious for its precision and brutality. Jung Wooyoung's life takes an unexpected turn when he meets Choi San. They've known each other for barely a week, but Wooyoung is already entangled in the company's dark dealings. He quickly realizes that reality is far more cruel than he ever imagined. How will the relationship between the two boys develop once the dark secret is revealed?