I Disguised Myself as a Man and Joined the Army, Creating a Reverse Harem (ongoing)

After my twin brother Erhan passed away, I disguised myself as him and joined the Demon Resistance Army to save our family from ruin. I just wanted to survive for one year, collect the bonus, and disappear. But I accidentally blended in too well! My past life's combat skills made me the strongest soldier, and now the original female lead is into me, the male leads are jealous of 'Erhan', and I'm at the center of a reverse harem I never wanted. Can I finish my enlistment without my secret being revealed?