ruyue academy just ended its annual cultural festival and came to a successful conclusion. high school students naomi nakajima (played by rina ikoma) and childhood sweetheart tetsushi shita (played by ryosuke ikeoka) and others are still in the classroom. everyone is reluctant to leave and want to stay in school for a while. at this time, a sudden thunder erupted, scaring everyone to block their ears, and the switch seemed to have problems. the supernatural girl shinozaki ayumi (played by maeda nishi) finds the candle used in the haunted house, so she also suggests playing the supernatural game of "happy yukiko". the predecessor of ruyue academy was tianshen primary school, which had a terrible incident. at that time, a health care teacher fell down the stairs and died, and two students were killed. the school became terrifying and terrifying. although the legend of "happy yukiko" is a game that can summon happiness, when everyone has played it, they fall into an isolated waste gas school building, and terrible stories are staged one after another... bbb　　 this film is adapted from the game of the same name.