This manga is way too good to be a oneshot!!
Summary: FL was isekai-ed into her favorite game where she was villainess.. To ensure people wouldn’t be sus of her, she told everyone she lost her memory and is now a no longer a mean and rude person as the old villainess character. In the game, her bodyguard will kill some character for hurting her so she did everything she could to prevent that from happening. Little did she know, the bodyguard knew everything of her plan from the beginning.
Until the Obedient Bodyguard Exposes the Body and the Lie of the Fake Lady