Prologue
Background
The world in the story is not the "Earth" we live on, but a kind of parallel world called "Earth-245."
In this "Earth-245," South Korea recognized the decline in the conscription-eligible population as a serious issue early on and began conscripting women starting in 2010.
Thanks to this, the concept of "gender conflict" has completely disappeared in "Earth-245."
By 2023, when the story is set, the gender ratio in the military has reached 5:5.
However, to fundamentally prevent sexual crimes, men and women are still serving in separate units.
Amid this, the higher-ups devise a plan to operate mixed-gender units for more efficient human resource management,
and a newly commissioned male artillery officer is selected for this plan...