Tsutomu Kondo, who suffers from internet addiction, visits a hot spring facility located underground in a big city. There, a beautiful female doctor with huge breasts, Dr. Yuna Sakurada, and some unusual guests were waiting for her...! ! A relaxing comedy that solves the problems of modern people in a leisurely, leisurely manner! ! A huge hot spring in the basement of a big city will soothe your mind and body, and you'll feel like you're dreaming of bathing in a hot bath with a beautiful woman! !