If you're looking for manga similar to Momoiro Sisters, you might like these titles.
As siblings go, Atsumi and Atsushi are anything but typical. High schooler Atsumi is exceptionally small for her age, and elementary schooler Atsushi is abnormally tall with a deep voice, leading to misunderstandings on both sides! Whether Moriyama-sensei gets embarassed by Atsushi's every move, or Atsumi is offered candy meant for children, or poor Atsushi is arrested for being a perv that’s trying to snatch kids on their way to class, this brother and sister duo is bound to have an eventful day-to-day life!
Tomoya’s father remarries to another woman, giving him a stepsister, Ichika. However Ichika is 17-years old and has completely fallen in love with her stepbrother who is only 13!
The everyday lives of five siblings—four sisters and one brother—who share a multi-unit apartment (danchi).
A story where the magical girls are all siblings living under the same roof.
Akane is the third-eldest sister of nine super-powered, royal siblings and she wields the power of gravity. She, and the rest of the rulers-to-be, are monitored by more than 200 surveillance cameras and broadcast nationwide. The process is in place so viewers can elect the next monarch, like a reality TV show. Akane is shy and desperately does not want to be caught on camera.
The daily hardships of Hikage Miyakawa, a young girl who lives with her sister Hinata. Due to Hinata´s otaku impulsiveness to constantly buy merchandise, the two girls struggle everyday to have something decent to eat.
The 4-koma crack comedy is back, and this time around Gorou's crush on his sadistic, older stepsister Haru has reached the stage where openly sexual innuendos have become part of their everyday life. The pair's "peaceful" days would have continued—if only it weren't for Haru's cousin Aoi-chan and her (dangerous?) younger sister-like existence.