Saikin, Imouto no Yousu ga Chotto Okashiinda ga Temporada 1 Episódio 1
Mitsuki has been troubling herself over her relationship with her new family and her new older brother now that her mothers remarried. To top it off, her mother is following her new step-father to his post abroad, leaving her all along with her new step-brother, Yūya, and only making her troubles worse...