In the world of Yon Kisetsu, the heart that believes is the strongest of all. This world is ruled by the will.

There are four lands. The Land of Natsu. The Land of Haru. The Land of Fuyu. And the Land of Aki. Each is ruled by a prince and is goverened by it's own season.

Natsu is the land ruled by summer and home of Prince Akira.

Haru is ruled by spring and is the home of Prince Hikaru.

Fuyu is ruled by winter and is the home of Prince Nobu.

And Aki is ruled by fall and is home to Prince Tanaka.

Each land has a story to be told. And each land is sustained not by the princes, but by the keepers of heart. Four girls with the strongest hearts in their land are chosen and kept in the palace. They are not allowed to think of theirselves or to even fall in love. If they do, the worlds will crumble.

Now... a new story is to be told. All is no longer well. A new keeper is being sought out for Aki after the tragedy that fell upon the keeper.

More on this new story...