 Unknown to Shusui, Shūei had fallen in love with her during their first meeting after she had helped him.Shūei is also a frequent visitor at Shūrei's house and he often pays for the ingredients every time he dines there, resulting in Seiran calling him "saifu #1" (wallet #1).In the novel and drama CD, Shūei's brother(s) Setsuna Ran sent him to Kiyou as a child to assist one of the princes (later identified as Prince Seien).