In his forties, Narumi Rokurou leads a directionless life, single and laboring as an editor in a publishing firm while crafting unprofitable literary works. His tranquil existence takes a turn one summer evening when a peculiar encounter unites him with an enigmatic woman, commencing a tale of their tumultuous romance. As the saying goes, 'Everything about a woman is a mystery,' echoing the words of Zarathustra.