There's no such thing as an older sister who hates their younger sister. Every older sister on the face of the Earth loves their younger sister dearly. I, Sakura Shima, have an adorable sister one year younger than me. The sister yuri comedy everybody is talking about! (Source: Kadokawa, translated)

Siscon Oneechan to Kinishinai Imouto is based on a web manga published on the author's Twitter account since April 5, 2018.