Hopeless siscon Hashima Itsuki has a diverse group of friends who each have their own struggles. The first class genius and lover, Kani Nayuta, is troubled about love and friendships. Shirakawa Miyako, the victor of three crowns, battles with her emotions even in her dreams. Oono Ashley, the brutal tax sabre, grapples with his past mistakes. Puriketsu, a natural-born illustrator, struggles to balance his artistic talents with his personal life. Despite their individual challenges, they all share a passion for playing games together, taking trips together, and working together. Watching over them is Chihiro, the kind and thoughtful little brother of Itsuki, who harbors a secret of his own.
Imouto sae Ireba Ii. has been licensed in English as A Sisters All You Need by Yen Press.
Isuke is a 20-year-old author who focuses on younger sisters as the main character in all of his books. he began publishing when he was still in high school and has since released over 20 novels, some...
Itsuki's ex-college classmate shares her love for reading Itsuki's books despite not pursuing a career in writing like him. She encourages his efforts as well as Kanis work, and her birthday falls on ...
Chihiro appears as Itsukis 16 year old younger stepbrother. Chihiro is a dependable person who looks after everyone and attends high school....
Nayuta is an exceptionally talented author who harbors deep affection for Itsuki. At just 18 years old, she has already established herself as a successful novelist following her victory in a newcomer...
Another author who debuted with Itsuki is named Haruto, who is 22 years old and frequently drinks alcohol with the latter. Despite appearing cool, he enjoys maid characters and owns numerous adult gam...
The daughter of the housekeeperlady who worked for Hashima family....
Ashley is a 32-year-old tax accountant who wears a red lolita style dress. She is reliable but very sadistic; she makes her clients reveal their fetishes through their expenses, but raises their tax r...
The individual responsible for converting Itsuki's light novel series, Mahou Gakuen (Imouto no Subete in the novel), into a manga is highly skilled and admires Itsuki. She also has an interest in litt...
An adolescent artist who previously created visuals for Itsuki's books but stopped after being informed that the author deemed their work unworthy of Seto's art at this time. The individual has a rela...
The individual who edits the work of Itsukis GF Bunko is known as Itsukis editor. Initially, it appears that this person and Itsuki do not have a positive relationship. However, despite appearances, t...
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