Kagai Katsudou Survival Method

is a Japanese light novel series written by Hazuki Minase, with illustrations by Yuukyu Ponzu. The series began publication on January 10, 2015 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Yako, a lethargic woman who gets into the bed in the infirmary, is a childhood friend who is worthwhile and caring. Yukiya Ishido's usual daily life with them changed completely one day. "Extracurricular activities" suddenly declared. About three-quarters of all school students died unreasonably, and about a thousand and several hundred survivors were forced to live in this huge school.

The condition to escape is to collect 500 "Shapes of Souls" that appear when you die. The students, each given their original different abilities, were thrown into the ultimate survival for survival. A gambler aiming for a one-shot reversal, an armed group that robs everything with desire, siblings who are drawn to a resting place, an honor student who appeals for order, a girl with a broken heart, a trio living in the infirmary, and appeared in front of them A person with serial murder ability--with each thought in mind, each fate begins to move.