Happiness is an obligation. But then, what gives one the right to be happy? A small, garden-like Academy stands alone on a secluded island. Ichirou Yamada has been transferred there to work as a teacher. He is put in charge of Casserole, a beautiful, young girl who entered the school at the same time. However, things are not what they seem at this "academy"...

Happiness is an obligation. But then, what gives one the right to be happy? A small, garden-like Academy stands alone on a secluded island. Ichirou Yamada has been transferred there to work as a teacher. He is put in charge of Casserole, a beautiful, young girl who entered the school at the same time. However, things are not what they seem at this "academy"...