Fujoshi na Imouto de Sumimasen(2017)

Fujoshi na Imouto de Sumimasen

The story of an otaku girl named Yuuko and her struggle as she fights solo against her handsome, normie brother who has gynophobia (with everyone except his sister).

The original web novel from which this is based has an r-18 sequel that takes place when the protagonist is 27 years old and the brother is a doting yandere.