Natsuki Ikaruga

A former student of The Academy an advanced school in the big city for only the brightest of students. After being forced out he finds himself living back in the tiny coastal town his grandmother called home. Having lost his mother and his leg at a young age in an accident he finds himself stricken with terror when forced into dark silent spaces. In order to obtain the money for an advanced cybernetic leg he buys into a plan to salvage a hidden treasure from his grandmothers sunken storehouse.