Strange Sex in Parallel Worlds

There's a convergence of worlds happening, and it's all in Tsukasa's back yard! Him and his sister Sachi have found that growing up is a bit odd, especially when dimensional interferences turn the boys into girls, the girls into hermaphrodites, and the hermaphrodites into giant city-smashing spandex superheroes! Worlds of magic, witches, and hyper-evolved sex toys collide, and it's up to inter-dimensional auditor Alia to save them all, as long as she doesn't get a bit distracted.