Due to boredom from work, Rimuru begged Ciel to go out to another world, but due to insufficient energy levels, while in the space-time tunnel, Rimuru encountered Phantom and was turned into a Spirit. But, actually, it was one of Ciel's plans to teach Rimuru a lesson. Even after knowing that he was tricked by Ciel, Rimuru still stays in this world to analyze the power of spirits. Note: You need to watch "Date a Live" and "that time I got reincarnated as a slime" to understand the plot. All the pictures in the story do not belong to us. [Status]: continuing. [Posting time]: Random.