A Sister's All You Need.

Itsuki Hashima is a novelist completely fixated on the idea of little sisters, and his daily life is anything but quiet thanks to the vivid group of people around him. Among them is a world-class genius and love guru whose beauty almost seems wasted on her. Another is a girl constantly troubled by her friendships and romantic interests, unable to find refuge even in her dreams. Then there is a ridiculously talented illustrator. Every one of them carries their own share of problems and worries, and together they never have a dull day as they play games, travel, and work alongside one another. From Yomi Hirasaka, the author of the famous I Don't Have Many Friends, A Sister's All You Need. follows this lively circle as they deal with creativity, relationships, and the many complications that come with both.