Jougasaki Nanaki ran away from a specialized child development facility and has been living off thievery on the streets. However, he stumbles upon a fortunate reunion with someone from his past, who leads him to a grand but rundown mansion located on the outskirts of town. While exploring the mansion, Jougasaki witnesses a young boy disappear through a wall right in front of him. Intrigued by this mysterious happening, Jougasaki decides to stay and work as the family's butler in hopes of uncovering the child's secretive past. What surprises will he uncover during his stay?
