Shun is the new kid in school, but he's already managed to attract the attention of the school bully, who's now making his life a living hell. It doesn't seem like things could get any worse, until the night he finds himself and a group of his classmates inside a creepy, abandoned mansion known as the Jailhouse. They quickly start to hear strange sounds and see weird things, but everything escalates when they realize they can't get out. Once they're trapped inside, a blue, unnaturally large figure chases after them. Is it a new species? Or is it the ghost of their old classmate who died in an accident? Nobody knows, but one thing is for certain... If it catches them, they're dead! The scariest game of tag in history begins!

Shun and his friends may have fled the Jailhouse, but now that the game is broken, the terror doesn’t end there. The rules—as well as the maps and the players—are changing rapidly, and they’ve only just scratched the surface of the mysteries at play. Things will culminate in one final round of the deadliest game of tag ever. Will they truly find a way to escape? Or will they be stuck in this nightmare forever?

A week after the first nightmare, Shun begs his classmates not to go anywhere near the abandoned mansion on the outskirts of town ever again, but the gears of fate seem to be turning against his will. They find themselves in the Jailhouse once more, and the man-eating monster that lives inside is happy to welcome them. Will they have the power to change anything? The game is the same, and the rules are simple: get caught and you're dead. It's time for round two in this lethal game of tag!

After Shun’s update doesn’t go as planned, he finds that the rules to the game are quickly changing on him. His worries are getting bigger and darker as the playing field expands and he’s forced to turn against one of his own friends to try and protect the others. Is there still a happy ending to be had after all of this, or will the Jailhouse still win even after they’ve escaped its walls? Let the grudge match begin.

Even if he has his closest friends on his side now, no one else seems to be willing to believe Shun about the dangers of the Jailhouse. Deciding to take matters into his own hands, he desperately codes an emergency update for his game to try and prevent any further tragedy. But they say the path to the Jailhouse is paved with good intentions... Will he give whoever gets stuck inside the tools to survive? Or will it all be used against them? Whoever the unlucky victims are next just might be in for an ugly, mutant surprise...

Based on the cult hit game, the novelization of Yume Nikki follows a lonesome girl into the bizarre dreamscapes that await her when she falls asleep. Opening doors and wandering aimlessly, is she really as alone as she thinks?

Nio Nakatani, known for her delicate and heartwarming portrayal of girls’ love, presents a marvelous collection of short stories that span her whole career. With works including her striking debut title Farewell to My Alter, enthralling tales from the Éclair anthologies, and a hauntingly captivating piece penned exclusively for this volume, Nakatani explores the deeper nuances of loss, identity, and matters of the heart.