A story spanning ten years about a delicate and reclusive older brother supported by his resilient younger sister. Even as he becomes an otaku and is ridiculed by others, to his sister, he remains kind and precious. Whether it's boyfriends or work, whenever his sister feels like giving up, her brother comforts her, and what starts as manual relief eventually crosses a line. Witness the bond of this brother and sister who support each other through sex over a decade.
