In this world, there are three identical-looking people in existence who split between them an energy-like force called Terra. This energy can be attributed to the amount of Luck or Life Energy that an individual possesses. There also exist beings who observe the human world, maintaining the balance (Coexistence Equilibrium) of Terra. These beings possess abilities that surpass those of normal human beings. They live in hiding in places known as Pure Places, in tribes. They are called the Terra Guardians. This is a tale of battle that begins with a chance meeting between a human boy named Keita and a young Terra Guardian girl named Kuro.

When the Agent of Spring, Hinagiku Kayo, is abducted, spring itself vanishes—plunging the world into unending winter. Refusing to give up, her devoted guard, Sakura Himedaka, searches for her for years. When Hinagiku suddenly returns, the two set out to restore the lost season, face the past that tore them apart, and reclaim the warmth they refuse to lose again.

In the year 2043, Infinite Dendrogram, the world's first successful full-dive VRMMO was released. In addition to its ability to perfectly simulate the five senses, along with its many other amazing features, the game promised to offer players a world full of infinite possibilities. Nearly two years later, soon-to-be college freshman, Reiji Mukudori, is finally able to buy a copy of the game and start playing. With some help from his experienced older brother, Shuu, and his partner Embryo, Reiji embarks on an adventure into the world of Infinite Dendrogram.

The year is 2045. Singing is forbidden, and an AI system called MiucS creates music in place of people. Seria Aiba, a high school girl who can see spirits, lives quietly under these rules—until one day, she hears a real human voice singing. Following the song, Seria discovers the source: a ghost. Now Seria must decide whether to stay silent or risk everything to bring music back to the world.

In the Kanto region of Japan, seven high schools take place in a turf war for territorial supremacy: Nanyo Academy, Kyosho Academy, Seito Academy, Yoshu Academy, Rakuyo High School, Gogun High School, and Yoshu Private School. The fighters of each school bear the sacred jewels called magatama, which contains the essence of warriors from the Three Kingdoms era of Ancient China 1800 years ago, as well as their fates.

In an adventure where teen brawlers are guided by ancient warrior spirits, Hafuku is flashing panties and cracking skulls.

At his emperor's command, Ryner Lute and his long-time comrade Ferris set out on a search for the Heroic Relics. During this journey, Ryner makes a shocking discovery - a deadly curse is spreading across the continent.