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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!
Both of these short comedies follow a slightly creepy brocon sister as they dote over their unfortunate younger brother. Cyclops Shoujo Saipuu is probably a little more sexual with the jokes though.
Both os these short-episode anime are about an older sister with a pretty intense brother complex. If you liked one, you'd like the other as well.
If you take Cyclops Shoujo Saipuu, replace younger sister with an older one and make the jokes much less ecchi dependant, than you'll get Onee-chan ga Kita. Both have very poor art and have virtually no plot, but Onee-chan ga Kita is more watchable due to lower amount of fanservice.
Both are short comedies that revolve around a sister who loves her brother a tiiiiny bit too much. Cyclops Shoujo Saipuu is far more sexual than Onee-chan ga Kita, but other than that they're pretty much the same thing.
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!
Two very short shows dealing with unusual sizes and siblings. Recorder to Randoseru has an older sister who is abnormally short and a young brother who is abnormally tall, while Cyclops Shoujo has a younger sister who suddenly grew due to puberty. Both include comedic skits with no real plot, so if you liked one, you may enjoy the other.
Short and episodic, both are about siblings with different personalities going through everyday life occurances. While Cyclops Shoujo Saipuu is by far the more perverted of the two (The only one that's perverted), they're both episodic and formulatic, keeping things mostly at status quo when the credits roll.
Both short series are about siblings who are very different from each other as they go through everyday occurances. Cyclops Shoujo Saipuu throws some ecchi perversion into the mix as well, something that Recorder to Randoseru doesn't dabble in.
Both of these shows are shorts that revolve around a brother and an unusual sister. Saipuu is much more sexual than Oosaka Okan, but I think if you enjoyed one, you might like the other as well.
Both shows are shorts with various ecchi scenes that feature a brother dealing with a strange sister. Cyclops Shoujo Saipuu is quite a bit more ecchi than Oosaka Okan.
Both series have short scenes with often fan-service content. While Oosaka-chan is more reserved about the amount of fanservice Saipuu doesn't even bother with subtle moments at all.
Fuuka may have the voluptuous body of a well-endowed twenty-year-old girl, but in reality she’s only a fifth grade student. After her mother goes overseas to work, Fuuka moves in with her relatives – including the masturbation-obsessed, eighteen-year-old Jiro – and begins attending Tonbori Private Elementary School. Between meeting new friends such as Miki and Kenji, Fuuka finds herself learning about lingerie clubs, the best way to put on a swimsuit, and when it’s not a good idea to walk around the house naked. For a typical elementary school student, Fuuka’s not-so-typical body helps keep every day a new adventure!
Takurou Mikoujima is an avid fisherman who loves nothing more than to sit alone on the pier and cast his line, enjoying the peace and relaxation that follows. But the boy’s pleasant, angling days soon come to an end when he gets an unexpected catch: a fat-tailed mermaid named Muromi whose very presence is anything but soothing! She’s nosy, rash and prone to violent outbursts; and what’s worse, she has friends! Whether the boy is harassed by the forgetful Harpy, the cheerful dolphin-lover Hii-can, the busty Fuji or the rest of Muromi’s wacky companions, one thing’s for sure: Takurou’s quiet days at the beach have come to an end!
Both series have large amounts of fanservice and no real overarching plot to them. Both series are short, Saipuu however is a great deal shorter than Muromi-san in terms of episode lenght and uses fewer rehashed tropes and clichés but still provides some fanservice along it's way.