Recently, my sister is unusual.

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Background

Saikin, Imouto no Yousu ga Chotto Okashiinda ga. follows a family just starting to rebuild. When they marry, Mr. and Mrs. Kanzaki bring a teenage son and daughter along for the ride. But high school freshman Mitsuki Kanzaki is less than thrilled. Stinging from a history of absent and abusive father figures, she is slow to accept her stepfather and stepbrother. But after an accident lands Mitsuki in the hospital, she finds herself possessed by the ghost of Hiyori Kotobuki, a girl her age who was deeply in love with Mitsuki's stepbrother Yuuya. Hiyori cannot pass on to her final reward because of her unrequited love for Yuuya, meaning she's got to consummate it... in Mitsuki's body?! Now, Mitsuki's life depends on getting Hiyori to Heaven. But will she get used to sharing herself with a pushy, amorous ghost? Can she overcome her distrust of her new family? Can she bring herself to fulfill Hiyori's feelings for Yuuya? And might she be hiding some feelings of her own?