A youth story of a passerby at the end of the world

He once wore armor and helmet at Hulao Pass, but was eventually killed at Xiapi. He once charged with a flag in Jerusalem, but was killed in a foreign land. He was stabbed in Toba-Fushimi, and carried a gun in Stalingrad.
Finally he returned to the peaceful modern world, a world with Sobu High School, Toyogasaki, and Minegahara High School... He felt that this time he could probably die peacefully.
It was not until noon that I saw a zombie unconsciously banging on the school gate. It seemed that this world was not as simple as it seemed.