I Reincarnated as the Villainous Noble Destined to Ruin My Favorite Heroine, so I'll Do Everything I Can to Protect Her From My Dark Side

Synopsis

The protagonist is reincarnated as Regret, the villainous nobleman in a romance RPG. To avoid the ruinous route for his favorite heroine, Princess Historia, he lives peacefully without committing any evil deeds. However, one day he realizes that the personality of "the real Regret" is still alive within him. Can he protect his favorite from this wicked, psychopathic alter ego!?