"Exclusive" can also denote a specific group's translation of a niche title that hasn't received an official global release. Narrative Pacing and Visual Style
No official anime or manga title matches it exactly. The keyword is a — a testament to how global fandom remixes languages, circumvents geo-blocks, and creates secret lexicons. shinseki+no+ko+to+o+tomari+dakara+de+na+warga+exclusive
— possibly a misremembered title or fan slang for a controversial or romantic sleepover scene between cousins or relatives in anime/manga. "Exclusive" can also denote a specific group's translation