If you're looking for manga similar to Himouto! Umaru-chan SS, you might like these titles.
The Shinamoto Siblings love themselves more than anything else. This story is also about the mysterious Aisato Siblings. Because these two sets of siblings are similar, it's natural that the boys and girls are friends with one another. Even though they may seem to think "only of themselves," their life motto is that "those of a flock must stick together". It seems that these two sets of siblings give off an otaku-lifestyle!?
Ichino Fukuyama and her fraternal twin brother Nita are animators! Once they graduated from high school, they followed their dreams to Tokyo and joined the Memochi Pro anime company! They refused to let the warnings of their parents and friends keep them from accomplishing their goals. However, it turns out that being an animator is actually a difficult dream to accomplish, with lots of job pressure, deadlines, low-pay, and no job security. On top of that, Ichino discovers that many of the other female workers don't even like to watch anime, and are embarrassed to be caught even talking about it. Ichino and Nita continue to give it their all, and stretch their meager paychecks as far as possible, all to accomplish their dreams of becoming successful animators!
Follows an aspiring manga artist and her older brother. The story begins when the sister's work wins the Rookie of the Year award. Even though she should be happy, for some reason her face is sullen. Is she hiding a secret?
Nakahara Yusuke is a high school boy who has a very loving younger sister, Maria. She loves spending each day taking care of him, doing things such as cooking and cleaning around the house. However, she typically goes a bit too far into treating him like a child--she has a habit of coming to his classroom at lunch to hand-feed him his bento, or brushing his teeth for him at home. She even snoops out his hidden porn magazines. Other people think they're a bit weird, and that Maria acts like his lover or his mom.
This manga follows the residents of Tokiwa So – a beat-down tenant apartment in Tokyo for manga artists. Maga Michio is a 21 year-old aspiring artist who is keeping a journal of his experiences as a starting out artist. When Konotera Yukie comes to stay with her younger brother, Michio is smitten. But Yukie has come to take her brother home and send him back to college – her father thinks that being a manga artist is no way to live. Can Michio convince her that her talented brother should stay? Or will she be the inspiration for his latest character design?