Steel clashes and sparks fly, an endless symphony echoing across the knight academy’s grim training grounds. Here, a warrior's worth is carved by their blade, their future forged in brutal combat trials. Only the truly prodigious ascend, their names becoming legends within the kingdom’s elite. Failure, however, means a swift, unforgiving end to any aspirations.

But for Na-Gyunn, the sting of failure turns into the icy grip of despair when he witnesses his twin, Na-Jin—a rising star among the trainees—cut down before his very eyes. A burning vow for revenge ignites, pushing him to make an impossible choice: to *become* Na-Jin. Slipping into his brother’s identity and donning his armor, Na-Gyunn takes up the blade, determined to master the combat prowess his sibling possessed. Yet, the brutal truth is, Na-Gyunn utterly lacks Na-Jin's natural talent. How long can he maintain this dangerous masquerade, training relentlessly under the eyes of the very people who would expose his secret identity, before his entire world collapses?

Also known as: Hwabun-ui Gisa.