خلاصه داستان : دختری جوان برای نجات مادر در حال مرگش به گذشته سفر می کند. پس از اینکه مادر دانشمندش به کما می رود، آکیرا تصمیم می گیرد با استفاده از تحقیقات مادرش به دهه 1970 بازگردد و...

Akari Yoshiyama is graduating high school soon and is expected to lead new life after she passes the university entrance exam, while her mother is working as a pharmacologist. However, her mother has a car accident and the situation is totally changed. She decides to go to 1972 to fullfil her mother's wish.

خلاصه داستان : هیداکی و همکلاسی های کلاس ششمش تاکشی، چیه و تتسویا پس از خودکشی معلم خود از خواب بیدار می شوند و خود را در مدرسه ابتدایی قدیمی خود می بینند. آن‌ها مجبور می‌شوند با بازی X Game همدیگر را شکنجه کنند.

After a childhood friend's suicide, Hideaki and his former classmates reunite to pay their respects. Soon after, a DVD, marked X arrives revealing a man being tortured, triggering a flashback in Hideaki, reminding him of witnessing a schoolmate being subjected to humiliating batsu (punishment) games. One evening, Hideaki is kidnapped and when he awakens the next day, he discovers he is in a recreation of his old school-room, along with his fellow classmates. Trapped and held captive by mysterious hooded figures, each of them must now play a brutally violent, version of the punishment game, in order to survive.