This is the tale of a young novelist, Itsuki Hashima, who only seems to write about younger sisters. We follow his life and that of the people around him: another genius writer, a classmate from college who is like an older sister, another male writer and more.
The anime is based on a light novel written by Yomi Hirasaka and illustrated by Kantoku. It started publishing in March 2015 and is still running with 8 volumes available until September 2017. It is being serialized in Shogakukan’s Gagaga Bunko. A manga adaptation is also being serialized since May 2016, as well as a manga about side stories since November 2016. Both are still running with 3 and 1 volumes so far released, respectively. The series is licensed for the english speaking market under Yen Press.
Voiced by: Satoshi Hino
A novelist, who looks really good but has a burning secret deep inside.
Voiced by: Yusuke Kobayashi
He is a novelist and seems to only write about younger sisters.
Voiced by: Hisako Kanemoto
Another novelist and junior of Itsuki. She is a genius who jumped to the top of the charts with her debut novel. What keeps her going is her love for Itsuki.