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 battlefieldBut 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!