Recently, My Sister Is Unusual
Saikin, Imouto no Yousu ga Chotto Okashiinda ga. · 最近、妹のようすがちょっとおかしいんだが。
Synopsis
In the romance comedy, a girl named Mitsuki Kanzaki lives with her step-brother Yuya after her mother remarries. One day, Mitsuki is possessed by the self-proclaimed spirit of a young girl, Hiyori Kotobuki. Hiyori (in Mitsuki's body) must fall in love with Yuya to move towards the "Gates of Heaven."
Studios: project No.9
Source: MANGA