Perhaps S01 E05

Yuuichirou Umehara (as Arata Shiunji (voice)) Chika Anzai (as Banri Shiunji (voice)) Marika Kouno (as Seiha Shiunji (voice)) Rie Takahashi (as Ouka Shiunji (voice)) Hana Hishikawa (as Minami Shiunji (voice)) Kana Ichinose (as Kotono Shiunji (voice)) Chiaki Kobayashi (as Shion Shiunji (voice)) Masaki Terasoma (as Kaname Shiunji (voice))

based on comic romcom romance tokyo, japan based on manga adopted seinen stepsiblings anime wealthy family love polygon romantic step-sibling romance