Ryuuto Sakurai
, 櫻井 流人
Touko considers him as her sibling, and he comes from a household that took her in. Despite being only in his first year of high school, he enjoys spending time with several females simultaneously during playtime.
He claims that hes the reincarnation of Takumi Suwa, his father who fell in love with Toukos mother (says that shes his first love) and responsible for giving poison for both Toukos parents to die in car accident. Hes like his father, who fell in love with multiple women who is older.
He likes girls with dark feelings or like he said "dangerous". When meeting Miu in "Parumiere (パルミエーレ)" book, he began his long term relationship with Chia.He has been another person besides Himekura that giving information to Toukos involvements to events using his way of "girlhood" until "Romancie" book. He forced Konoha to write novel or Touko will "disappear".
