Kisaragi Sasana suddenly realizes that she has been reincarnated into the world of the 18+ bishoujo game "Hakumei." Furthermore, the character she is reincarnated into is a senior at the protagonist's company, a power-harassing mob office lady and a lucky pervert! Shocked by this unbelievable reality, Sasana decides to give up her power-harassing character and enjoy the life of a mob character in this world. To do so, it is essential that she avoid the bad ending. She struggles to lead the game's protagonist, Izumi Haruto, to a happy ending, but things are somehow starting to differ from the game's story...!?