After her mother's death, Celestia's father remarries, bringing a new wife and stepdaughter into their home. What she hoped would be a harmonious addition turns disastrous when her stepsister abruptly declares herself the world's heroine—and unveils a supposedly inevitable future where Celestia suffers a broken engagement, loses her father's love, disrespects royalty, and faces ruin. Skeptical of such elaborate delusion, Celestia finds the prophecy eerily materializing. To circumvent this cursed trajectory, she makes a radical decision: abandon her noble station entirely. She seeks shelter with her grandfather, a distinguished military officer, expecting temporary refuge. Instead, she finds herself conscripted into military academy, beginning a soldier's path she never chose. Her exceptional talent propels her steadily upward, culminating in the rank of Colonel. This unconventional career forges her notorious reputation: "The Brutal King of the Frontier Fortress" and "Battle Maniac" become legendary titles whispered throughout the military realm. Her sphere naturally expands to encompass an extraordinary network—fellow nobles, senior officers, and astonishingly, royalty from distant nations competing for positions in her ranks. By fleeing her life as a noblewoman, Celestia has ironically constructed a social circle far more exalted and expansive than the one she abandoned.