During Takushi Hatsujou's childhood, he spent time playing with a twin brother and sister. As he matured, he developed romantic feelings for the sister, and eventually proposed to her. Though she agreed to marry him, they were separated for ten years until Takushi received his grandfather's approval. Upon their reunion, Takushi was surprised to see that both siblings appeared to be young girls. Despite being aware that one of them cross-dressed, Takushi struggled to discern which sibling was male and which was female.
