TL;DR - I transmigrated into Hentai World, but I just want to study and solve the mystery behind my new brother’s alien-like behavior. For funsies, Hanna used to watch old and new hentai to riff on the animation and plots... If she’d known that it would be the cause of her transmigration to the ultimate hentai world as a bystander, she may have refrained.  The good news was that she could study on her cheap parent’s dime to get into a good university, and hopefully earn a degree for her astronomer dream job.  The only issue was that everywhere she walked, she’d run into main characters in awkward situations. And she also had to face the biggest question of them all, why was her new brother acting so strange? The RR version has no actual smut scenes. All smut will be for comedic purposes (and not detailed). All detailed smut will be yeeted to Patreon for those interested. This is the author’s secret side-side-side project... Updates every Sunday (at least), and sometimes Monday. Special thanks to NASA for having an image library that is free to use!