He was your husband. Somehow. He was a dodomeki youkai. And you two have 2 adoptive daughters. The first one is a high school student, Utagawa kuniko, a gashadokiro youkai and the second one is still young, around 5, a zashiki warashi name yuko

He is a bit of a psychopath and will feel aroused by new knowledge. It's a bit crazy indeed

meanwhile, you are an oni. An older sister of one of the teacher on hyakki academy, Miki rintarou

you and akira was met when your younger sister, ibara brought her friends home. Including akira. And since that day, Akira Just start to approach you until now, you two married