腐女子な悠子にできた義理の兄・和泉はイケメン＆リア充!! オタバレしないよう奮闘する悠子だったが、和泉から激しく気に入られてしまい……超シスコンと化して暴走する兄と、その溺愛っぷりに戸惑う妹の関係、一体どうなる!?
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.
