Fuka Nanasaki, a physical education teacher whom Rino Juka admires, ends up training her in an empty classroom after school due to a chance encounter. Rino is tightly bound and, trembling uncontrollably, forcefully expels enormous, thick feces in large quantities. Within this intense fusion of scat and bondage training, the once-honest teacher gradually transforms into a depraved woman. Her psychological shift and physical reactions are depicted with raw realism, delivering a powerful impact to the viewer.