Astral Online: I, Who Became the Strongest Beautiful Girl Due to the Demon King's Curse, Have the Weakest Job, But I Grow Up Super Fast With My Cheat Skills and Become a Warrior.

Sinopsis

Sora Kamijou, a high school boy who is addicted to VR games, starts playing Astral Online, a VRMMO that has been talked about as a god game, and suddenly finds himself fighting against the Demon King, the last boss. In addition to the sudden battle, the Demon King casts a curse on him and transforms him into a beautiful silver-haired girl...? A new VRMMO fantasy involving both the game and reality begins! (Source: Kadokawa, translated)