The main character died in an accident in the present day. You wake up deep in an otherworldly dungeon. Apparently a shapeshifter. It seems that he has been reincarnated as a demon that can transform into anything. Despite the expectations of the demon king and his fellow demons for his power. The person in question was thinking something completely different. ”With this power, you can do all the erotic things to the girls…! Days of erotic mischief by the hero, who has literally turned into a monster of complications, begin.