Based on the award-winning novel, the first book in *The Higa Sisters Series*! When Tahara Hideki was a child, he had an encounter with “Bogiwan”, a monster that his late grandfather feared. Now that he's entered the workforce and has a family, he receives an unseen visitor… When a junior colleague loses an arm, strange happenings occur in his home, and an invisible terror approaches, he clings to… A nonstop horror that's making waves! ___ **Alt Official Raw:** [niconico Manga](https://manga.nicovideo.jp/comic/35586)