[After 5 weeks of serialization, 1 week hiatus] Min-a and So-yeon have been inseparable friends since childhood. One day, they coincidentally discover that their boyfriends look exactly alike, leading them to suspect infidelity. They call their boyfriends to a hotel for revenge. However, two men appear at the hotel. It turns out their boyfriends were twin brothers. The misunderstanding is cleared only for a moment, as the two women seize this coincidence as an opportunity to propose a secret relationship with each other's lovers...