Kaibutsu Oujo S01E02 - Princess Destruction

As an invisible man enters the mansion to assassinate Hime, she goes wild with a chainsaw chasing him, but to no luck. After the invisible man covers the hallways with invisible threads, Hiro gets caught by these traps, but Hime and Flandre manage to save him. With his life force fading and needing restoration, Hiro slowly comes to realize that he has no choice but to be involved with Hime. After injuring the invisible man and following him into the basement, Hime eventually sets the mansion on fire. The invisible man tries to escape from the mansion, but Hime is able to slash him when seeing him on fire.