Amidst towering steel pipes, tangled power lines, and dimming neon lights, there is a game that children dare to play in the ruins of the old city. "Otokoyo" is a secret game of hide-and-seek where all players wear fox masks, and it only starts once seven have gathered. However, it is not an ordinary game, as everyone who has played it has gone missing. Many whisper that it is the work of demons, but that is merely a rumor... or is it? Kakurenbo follows the story of seven children as they play Otokoyo for the first time and uncover why those who play never return.