R&B has long been mainstream in the world of pop music, but its meaning has evolved far beyond the original sense of "Rhythm & Blues." Moreover, it isn’t easy to grasp the full scope of this expanded scene. What exactly is R&B in the first place? Which artists and which songs should you listen to in order to better enjoy the world of R&B? Music producer Kiyoshi Matsuo will explain R&B—from the 1980s through the 2020s—with "mellow" as the keyword, and, while actually listening to the recordings, will unravel its appeal. It’s an adults’ after-hours class where you can either bring a notebook and study seriously, or enjoy limited-edition soul foods and drinks while getting mellow.