She entrusted her boyfriend with a resurrection ritual—a forbidden technique to bring the dead back to life—and in the process, lost her own life. Though the ritual succeeded and she returned from death, she was no longer the same. She forcibly made her boyfriend eat her feces, and did the same when her father came to visit. As a result, a mysterious disease born from coprophagia began to spread. This work is a unique defecation mystery centered on ancient secret arts surrounding life and excretion. The story explores how her relationship with her boyfriend changes after her rebirth as a new being, and uncovers the true nature of the infection.