Two men have just arrived at a location known as Quindecim and are unable to remember how they got there. They are immediately greeted by a young woman who escorts them to a small bar, where a bartender awaits them. They are told that they will have to participate in a game, randomly chosen by roulette, and will be unable to leave until its completion; if they refuse, the consequences will be dire. In addition to the rules of the game, the two men are told to play as if their lives are at stake. The game that has been chosen is billiards. But there's more to it than just pocketing pool balls, as the two are about to find out the outcome could mean life or death.

When approached by a fellow death god tempted to visit the human realm, Ryuk recounts his own journey to the other side and the story of Light Yagami—a brilliant young man who impressed him there. One day at school, Light stumbles upon Ryuk's lost Death Note and realizes it is not an ordinary notebook. He learns that it has the ability to kill every person whose name is written inside, provided that the user can visualize the victim's face. Having long deplored the decadence of current society, Light believes this sinister weapon offers him an unexpected opportunity: to eradicate all evil and bring about a new ideal world. Following a string of fatal heart attacks, the authorities start to suspect that the alarming number of dead criminals is not coincidental. Determined to uncover the mysterious culprit, they join forces with L, an internationally renowned detective. As the death count escalates, Light and L clash in a breathtaking confrontation of wits and deception—a duel that will decide the future of humanity.

It was just a usual morning. Akira Shiroyanagi, a high schooler who loves games and Konpeito (Japanese sweets), has suddenly been dragged into a battlefield by a mysterious girl who calls herself Mion. The participants are told that they are erased from the family register, involved in an experiment, and gained certain powers. Akira is determined to win the game with his newfound powers and destroy the organization. Armed with a power no one expects and his brain skills, the new period of intelligence battle begins! (Source: MU, edited)

Sixteen-year-old Maise Higa spends her summer days working part-time at her family's hotel, with absolutely nothing interesting to do. That is, until she meets Ichirou Suzuki—a mysterious boy who is seemingly haunted by strange supernatural occurrences. Upon interacting with him, Maise unexpectedly enters a different reality, where hotel rooms can transform into the deep ocean and banyan trees can spawn indoors out of nowhere. Intrigued, Maise accompanies Ichirou in his quest to uncover the secrets behind the inexplicable enigmas surrounding him.