Since my parents passed away, my sister Shiori and my younger brother have been living under one roof. - The younger brother, who has reached puberty, witnesses his sister maturing as an adult woman, and his crush swells day by day. The younger brother calls his best friend and seduces his sister Shiori, and Ryo ●. It was a twisted incest. - Tokunaga Shiori's glossy scent and intriguing limbs explode!