After the Fourth World War, the five major cities of Moscow, Tokyo, Guangzhou, New York, and Cape Town all suffered nuclear attacks, and the earth's population dropped sharply to four billion. The world is shrouded in the shadow of war, and the prevalence of cancer and depression is four times what it was in the 22nd century. Peace enthusiasts call on mankind to think about how to protect human civilization and reduce struggles.
It is believed that the fight for eradication can only be achieved by relieving pain. Without physical pain, without mental pain, dissatisfaction with life will disappear. Removing pain is like religious baptism, which will give people eternal peace and beauty.
Senai is a complete mutant who cannot eliminate pain. Her life had been moving forward smoothly under the protection of the special academy, until when she was fifteen years old, the appearance of a new student completely changed her life.
Intention: After letting go of pain, will our life be happier?