Kazuki lost his parents when he was young, he doesn’t remember much about them. Apart from that they were worshipers and followers of a local god known as the weather god that looks like a dragon. The weather god was said to protect and maintain the weather of the town he leaves in. The only memento of them is in a form of a necklace with a symbol of the weather god, in which Kazuki wears for good luck.

Shortly when Kazuki lost his parents, he met 4 friends in day care named after the seasons Haru, Natsu, Aki and Fuyu. From there the 5 became childhood friends. Kazuki was taken in by Haru's family.

Skip to present day, 1 month in his new school Shiki high school. Kazuki is concerned about not knowing what club to join. Compared to his other childhood friends Kazuki has no special talent or any hobbies and interests. He is worried about his future and lack of direction in his life. Haru and his other friends concerned for him suggest that Kazuki should try their clubs for one day everyday in a week.

From there Kazuki makes a decision that changes his life and the others around him.

[From official site]