伊知川は弟の武伊と喧嘩し、母に「姉だから我慢しなさい」と言われる。かばってくれる兄が欲しいとミモラに言い、食べると兄妹になれるイモをもらう。そこで伊知川は、本丸に食べさせて兄にする。
Ichigawa gets into a fight with his younger brother Takei, and his mother tells him to put up with her because she's his older sister. He tells Mimora that he wants a brother to protect him, and when he eats it, he receives a potato that allows him to become a brother and sister. So Ichigawa feeds Honmaru and makes him his older brother.