If you're looking for manga similar to A Sister's All You Need. Gaiden: Imouto ni sae Nareba Ii!, you might like these titles.
Tomoki, a high school student lived with his older sister. What happens when a normal boy has to put up with his sadistic but popular sister?
Neiko Futaba is the school idol, but little does everyone at school what's she's really like. Only her beloved younger twin brother Otohiro knows her overly clingy persona, much to his dismay. On top of that, it seems Neiko seems to be rather determined to seduce her brother in every way possible. Unfortunately (or fortunately) for Otohiro, it is just an everyday occurrence in the Futaba household...
The one thing not ordinary about high school student Ryouta is that he has an aspiring manga artist for an older sister. She is so dedicated to her drawing that, despite being 21, she's never really been in a romantic situation. Unfortunately, when she gets her first real job, it's to write an erotic manga. Desperately, she enlists the reluctant Ryouta's help, as a 'model', to figure out how exactly to draw this sort of manga.
In a certain star system, there is a small planet called the Onsen Planet. The entire surface is covered in hot springs, and the ones who manage them are the four Santa Monica siblings.
When Konoe Moyako and her little brother, Akira, were young, he said he wanted to marry her. Naturally, Moyako decided that her little brother was a complete pervert who was obsessed with her. Now that they're both teenagers, Moyako is convinced she needs to 'rehabilitate' him. However, it seems that the 'perversion' is entirely in her imagination, and she can't seem to help turning completely innocent situations into creepy ones in her mind!
Follows a boy named Jun who is childhood friends with two twin girls with different personalities. He ends up in a love triangle with Rumi, who looks boyish but is an maiden on the inside, and her twin sister Naori, who is a cute otaku.
Ane (Older sis) is uber perfect; she’s beautiful, intelligent and is admired as the president of the student council. But, when it comes to her little brother, she goes nuts, unable to control her over-the-top obsession with him. Their days get even more chaotic surrounded by a bunch of oddballs, from a mentally-disturbed best friend, their little sister with a sister complex, an ex-punk convenience store manager, a hardcore masochist, a loli-con and more!