Doubt!! is a tense psychological horror survival manga that turns a simple online game into a deadly real-world nightmare, following a group of strangers who wake up trapped inside a sealed building and are forced to play a twisted version of the social deduction game Rabbit Doubt, where one of them is secretly a killer and escape is only possible by uncovering the truth before being brutally murdered, unfolding through claustrophobic settings, escalating paranoia, and constant betrayals as fear erodes trust and every interaction becomes a potential death sentence, delivering sharp pacing, shocking violence, and mind games that explore deception, guilt, and the darkness hidden behind ordinary faces, making it a cult favorite among fans of death games and psychological thrillers, also known as Doubt!! manga, Doubt manga, DOUBT!!, ダウト, Rabbit Doubt, Doubt survival manga, death game horror manga, and psychological murder mystery manga.