Saikin, Imouto no Yousu ga Chotto Okashiinda ga.

High school girl, Kanzaki Mitsuki, just got a new older brother when her mother remarries a fellow divorcée with a son. Soon after, her new step dad gets transferred overseas and her mother follows him there, leaving Mitsuki alone with her new step brother, Yuuya. Feeling abandoned by her mother, sh