If You’re Captured by a Sweetly Obsessive Male Lead

I was possessed as the villainess younger sister of a tyrant who gets rejected by the male lead. In order to avoid dying, I tried to send my evil older brother to the battlefield… But why are you here? The male lead is lying in front of our barracks? I couldn’t just let him die, so I helped him… but something’s off about him. “Take me with you, Rose. If it’s not you, I’ll die…” “Rose… please, I need you. Save me…” But I’m the villainess younger sister of the tyrant! Why are you clinging to me! I couldn’t ignore the dying male lead, so I ended up helping him, and then… “Let’s get even closer, Rose.” “What do you mean… closer?” “Kiss and… everything else…” He pulled me into his arms with a serious look on his face. Then he whispered with a smile that melted everything, “You’re my first, Rose.” Wait, no! It can’t be me if I’m your first!