A Sister’s All You Need.

Itsuki Hashima is a novelist who's hopelessly enamored with the idea of little sisters and is constantly surrounded by colorful characters. A world class genius and love-guru who's beauty almost seems a waste on her. A girl who's constantly troubled by her friendships, love interests, and can't even find refuge in her dreams. A ridiculously talented illustrator. Each of them have as many problems and worries as the next and they never have a dull day together as they play games, travel, and work together. From the same author of the famous *I Don't Have Many Friends*, Yomi Hirasaka! (Source: Yen Press) *Note: Includes four extra chapters.*

The spinoff manga focuses on Nayuta Kani, who falls in love with the novelist Itsuki Hashima through her literature. Since Itsuki likes little sisters she decides that she needs to become a little sister for him.

Ayu Shirakawa, who has run away from home. Through her cousin Miyako, Ayu is introduced to the author Yukari Ebiwara (penname Hikari Kairou), and starts a part time job as her caretaker. Yukari often slacks off by playing games and going on trips, but Ayu really enjoys her new everyday life. And as the two live together and grow closer, Ayu starts to have feelings she never had before.