After his recent split, Hojun struggled with accepting the fact that his ex had deemed him unsatisfying in bed. But, in a drunken haze, he surprised himself by enlisting the services of Mr. Ahn, a self-proclaimed sex coach. While Ahn Seunghyun had initially posted his tutoring ad half-heartedly, he found himself unable to back out once the lessons had started. As Hojun and Seunghyun continued to meet, Seunghyun found himself increasingly infatuated with Hojun's appearance. Without a plan in mind, Seunghyun improvised each lesson, leaving the nature of their "final exam" a mystery.
