Hideout is a short but devastating psychological horror manga that traps readers in a claustrophobic nightmare of guilt, madness, and survival, following Seiichi Kirishima, a failed novelist whose marriage and life collapse after a personal tragedy, leading him to lure his wife into a remote seaside cave with murderous intent, only for everything to spiral into a far more horrifying descent as the cave reveals unnatural dangers and forces him to confront his own sins, unfolding through oppressive atmosphere, minimal dialogue, and relentless tension that blur the line between external horror and internal torment, using darkness, isolation, and raw emotional pain to explore themes of regret, responsibility, grief, and the inescapability of one’s actions, delivering an intense, fast-reading experience that leaves a lasting psychological impact despite its short length, also known as Hideout manga, HIDEOUT, ハイドアウト, Hideout Kakizaki Masasumi, psychological horror manga, cave horror manga, short horror manga, and dark guilt-driven manga.