The previous user review is a joke, because this movie is not even close to being a Japanese blockbuster film in the same league as "Death Note" series. In fact, this movie's budget is probably lower than Fujiwara Tatsuya's salary alone for the 2 installments of "Death Note" films.Now, I thought this movie had a very interesting story where people named "Satou" were dying mysteriously in Japan. As it turns out, they were dying in a parallel world where a game of tag was played throughout Japan, people with surname of "Satou" are trying to escape from 'Monsters'. (In Japanese, the game of tag is literally called 'demon/monster game') Those caught are supposed to be executed later, and those trying to resist after being caught are killed on the spot.The movie had a great pace, constant action. Although the parallel world and "super-powers" made no sense, the story development was fine, and characters developed very well. The sister Ai's narration near end of the film and the ending were really stupid, but it was to be expected of a B-Movie.Over all, if you like Battle Royale-type film AND low-budget films, you'll enjoy this. I personally can't ask for more from this movie, except for a higher budget!