Twosome Coffeehouse is owned by a man called Choi Siwon. Customers named him Coffee Prince Choi, as he is a true stunning man, especially when he wears the apron working behind the coffee bar brewing his favourite coffee. Other than brewing coffee, he is one observant boss as well, observing his customers when he brews his coffee... And thus, many stories were unfold in his coffeehouse within his eyes...