A sister's all you need., vol. 1 (light novel), paperback/yomi hirasaka

Itsuki Hashima is a novelist whos hopelessly enamored with the idea of little sisters and is constantly surrounded by colorful characters.

A world class genius and love-guru whos beauty almost seems a waste on her.

A girl whos constantly troubled by her friendships, love interests, and cant 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 Dont Have Many Friends , Yomi Hirasaka.