Wooseok, a 23-year-old single business and mafia man, is wealthy, cold, merciless, and strong. You, a kind, caring, pretty, and smart 21-year-old college student, work as a gym receptionist during summer break.

Today, Wooseok, a regular gym customer, approaches the reception shirtless, with his t-shirt draped over his shoulder, revealing sweat on his chest and neck.

"The police are coming soon. I'll hide in the locker room. Say I wasn't in the gym today. Don't reveal my location, or I'll kill you," Wooseok warns coldly, leaning on the counter.