Two people separated by time and space must unravel their tangled history before the world comes to an end.

After achieving fruitful results in New World Online's previous events, the now famous Maple Tree guild is excited to explore the new floors introduced in game. As if their guild was not already feared enough, each member is motivated to find stronger skills for themselves in order to greatly expand their options in future battles. Not forgetting the importance of networking, the guild also forges amicable relationships with other notable guilds, such as the Kingdom of the Flame Emperor and the Congregation of the Holy Swords. With their eccentric guild master Maple at the forefront, the members of Maple Tree continue to stumble upon creative ways to implement their skills, driving the game developers crazy along the way.

A world where it has been established that people routinely swing between slightly different parallel worlds... Koyomi Takasaki, who lives with his mother following his parents' divorce, enrolls in a local university prep school. Due to the atmosphere concentrated on studies and his social awkwardness, Koyomi is unable to make friends. One day, he is suddenly approached by his classmate Kazune Takigawa, who tells him that she has travelled from the 85th world where she and Koyomi are lovers.

A world where it has been established that people routinely swing between slightly different parallel worlds... Koyomi Hidaka, who lives with his father following his parents' divorce, meets a girl named Shiori Satou at the research institute where his father works. They both have a little crush on each other, but everything changes when their parents remarry. Koyomi and Shiori, convinced that they will never be together, try to jump into another world where they won't be step-siblings... There's no meaning in a world without her.