Fantasy: I Have a Sword That Is Invincible

[No system + single female protagonist + invincibility + decisive killing + trash counterattack + slap in the face] I have a sword, but I don't practice it at all. It's useless and defies the heavens. I have a sword, hidden in the palm of my hand, one strike will hit me in the face I have a sword. Please read the manual and recharge it. I have a sword, I can pursue women to continue my relationship, I can kill decisively I have a sword, you have wine?