A high school girl introduces herself as a student and, simultaneously, the wife of a novelist she calls Hii-kun. In the early days of their marriage, life felt joyous and full of closeness, but her husband has since become absorbed in his writing, often isolating himself during work. This growing distance leaves her feeling lonely and uncertain about their relationship, causing her to question whether he is truly the right partner for her.

The title is a collection of short stories rather than a single continuous narrative. The opening piece, I'm His Wife, focuses on Nako and her struggle with the emotional gap that has formed between her and her husband, Hideaki, despite their physical proximity. Other stories in the volume explore different romantic and relational dynamics. Love Mates follows a girl named Yamada who, longing to escape her loneliness, decides to take on a roommate, only to discover that the new housemate is a young man, leading to awkward and complicated feelings. Children Salad centers on Akira Oda, a flustered and inexperienced nursery teacher who struggles to connect with the children at his new job, and his growing attraction to a colleague named Emi. The final story, The Flower Language of Lilac, continues the theme of examining loneliness within intimate relationships, particularly the sense of emotional disconnection that can persist even when two people are physically close.

The overall setting is contemporary Japan, and the characters are ordinary young people navigating the early stages of love, cohabitation, and personal ambition. Across the collection, the narrative arcs consistently explore mismatched expectations in romantic and domestic partnerships, the ache of solitude, and the search for genuine emotional connection.