Saikin, Imouto no Yousu ga Chotto Okashiinda ga. OVA

When a young man’s stepsister suddenly becomes possessed by the ghost of a lovelorn girl, his previously normal — if a little awkward — home life takes an immediate turn for the bizarre. The spirit, apparently unable to move on without experiencing true love, has chosen his sister as her unwitting vessel, leading to a series of increasingly outlandish demands and situations. Now, not only does he have to navigate the already tricky waters of a new sibling relationship, but he's also tasked with helping a pushy phantom find romance, all while keeping his sister's body out of trouble. It’s a comedic and often compromising journey of supernatural meddling and unexpected affections that pushes the boundaries of family dynamics.

✦ AI-drafted summary