Synopsis: Sign Language

"Cafe Go Yo" possesses a few notable characteristics which set it apart. Initially, the standard of their coffee is subpar. Next, their clients tend to order items not listed on the menu. Finally, the manager of the establishment, Go Yo, is unable to hear. When Soo Hwa becomes a part-time member of staff, he is not under any pressure to master the art of coffee-making. However, he is encouraged to enhance his knowledge of sign language beyond the basic level. Despite his interest in learning, Soo Hwa is hesitant to accept Go Yo's proposal for private tutoring. This is not because he has no desire to learn but because he finds himself struggling to control his attraction towards Go Yo due to his seductive and resonant voice.