/jp/ - Otaku Culture

>The Ryuun were an advanced race, said by Yeasomul to be similar to humans except they evolved differently, from an ancestor with horns. The Ryuun developed many advanced technologies and could create artificial intelligences such as Ryuun-Ohc. When the Ryuun homeworld was on the brink of destruction due to unknown reasons, the Ryuun decided to immigrate to other worlds. They developed Lynoses (ライノス Rainosu), or Control Gates (管理門 kudarimon), devices which could "phase transition" by transforming objects and people into information and reconstructing them on the other side. Many Ryuun were sent past the dimensional wall to other worlds and settled on Earth.

So Hanyuu was an alien and the Hinamizawa syndrome was caused by aliens. I hadn't realized that Higurashi was Sci Fi all along.