Stockpiling Supplies in the Apocalypse: My Pocket Dimension Can Grow Crops

Before the apocalypse arrived, I unexpectedly acquired a space where I could farm. While everyone else struggled among the ruins, I grew vegetables and flowers in my space. While the strong fought over resources, I quietly stockpiled supplies. Then one day, the elite soldier from the capital discovered that this little haven, hidden away by his comrade's younger sister, was humanity's last hope.