Yuka Saitou

Lu Shuiyin (Riku Suigin in Japanese) is a master of gaming, a skill only known to his classmate Lu Lian (Riku Lin in Japanese). One day, Shuiyin receives a device from Lu Lian for a tomb raiding online game. While Shuiyin is excited to receive the device, Lian is suddenly kidnapped. Shuiyin touches the device that was left behind, pulling him inside the game and trapping him there. What is the imaginary world inside the device? What will Shuiyin find there? It is a world where two groups of people fight over the power of the gods, which originates from the tomb the mother goddess Pangu (Bango in Japanese). The two groups are the tomb raiders and the tomb protectors. The device Shuiyin received from Lian is called the Monolith, and it allows a normal gamer to go near the tomb. The tomb raiding group plans its attack by recruiting common people in the name of gaming. Shuiyin, as the final tomb protector, must fight against the raiders in order to save Lian.

The story is set at Shiomi Academy, a vast, prestigious academy with a Daitoshokan (literally, "great library") that rivals Japan's national library. As a member of the Library Club, Kyoutarou Kakei goes to Daitoshokan to enjoy reading by himself. He then meets a second-year girl named Tsugumi Shirasaki through the efforts of a so-called "shepherd" who fulfills people's wishes. Eventually, more girls join the club thanks to the "shepherd."

During a fiercely hot summer in Sotoba, a peaceful and quiet village with a population of 1300 people, a series of bizarre deaths begin to occur. At the same time, a strange family moves into a long abandoned mansion in the region. After supposedly visiting this strange family, the fashionable Shimizu Megumi goes missing and the entire village goes out in search for her.

The series revolves around a private high school whose student council is chosen entirely by popularity vote. Because of this, Ken Sugisaki is the only male representative, in the otherwise all -girl student council, that may enter the "sacred sanctuary" of the council's meeting room. At the behest of Council President Kurimu Sakurano, Sugisaki records the minutes of the council meetings, which devolve into daily conversations about the students' lives and interests.

Miyanaga Saki is a high school freshman who doesn't like mahjong. Ever since she was a child, she would lose her New Year's gift money during her family mahjong game. If she won, her parents would be upset, and if she lost, well, she lost. As a result, she's learned to play in such a way that her score always remains plus/minus zero: not good enough to win, but not bad enough to lose. When we meet her, she's being dragged to her school's mahjong club by an old friend. How will a girl who hates mahjong, yet has become adept at the game as a result of her upbringing, survive in this environment?