The series revolves around the Mizuki Diving Club (MDC), which is on the verge of closing down after having financial troubles. The club's new coach persuades the club's parent company to stay open on one condition: that the club sends one of its members to next year's Olympics as part of Japan's Olympic team. (Source: ANN)

The year is 2222. It has been years since Tears of the New Moon, a mysterious rain, poured and wiped out almost the entire human race. The poisonous rain gave birth to deformed creatures devouring humans, and humanity fled from the danger. As means for survival, the humans then build an underground haven; Amasia. In this newly built dystopian city, in a pursuit of maintaining their existence, they run into an Artificial Intelligence named Magus. Not knowing how things will work between them, the story of how Humans and AI coinciding and trying to find their truths begin.

With the increasing need for Tokyo to expand as one of Japan's major cities, inevitable sacrifices must be made so that changes can take place. One of these sacrifices is that the room for nature and wildlife to flourish will decrease significantly over time. As this decline continues, many animal communities experience the brunt of urbanization. One such community known as the "Tanuki," a type of magical shape-shifting mammal, is caught up in a struggle to defend their beloved forest from being absorbed by the looming threat of an expanding Tokyo.

As more and more Tanuki find themselves with nowhere to hide and territorial fights become increasingly regular amongst the different factions of the community, the elder Tanuki Oroku decides that something must be done. For the sake of their home as well as the safety of their future generations, the Tanuki unite as one with the hope that together they may be able to repel mankind's construction projects and scare them away from the forests using their shapeshifting abilities.

But as they begin their first attempts at sabotage, the Tanuki soon realize the operation will be no easy task. Will they reclaim their forest as a united community, or will they be torn apart by a war against humanity, blinded by anger and pain after witnessing nature's destruction?

[Written by MAL Rewrite]

Ever since her crush rejected her by insulting her appearance, Sunako Nakahara has been a shut-in with a hatred for beauty, embracing all things morbid and occult-related. She is sent to live in her aunt's mansion which, to her dismay, she'll share with four exceedingly handsome boys her age. Furthermore, her flighty aunt has made a deal with these boys that in exchange for living there rent-free, they are to turn Sunako into a proper lady by the time she returns from a trip around the world. Thus begins Sunako's hectic life with abrasive Kyohei Takano, ladies' man Ranmaru Morii, calm Takenaga Oda, and friendly Yukinojo Toyama. As she interacts with them she finds them less obnoxious, and she may not be as much of an outcast as she thought. [Written by MAL Rewrite]