Sanae Kamiya leaves the Kamiya family apartment to pursue her dream of becoming a novelist after years of putting family obligations ahead of writing. Her departure is not a break made in isolation: her younger brother, Tooru Kamiya, urges her to continue and learns to run the household so that she can find time to write. The separation is therefore also the culmination of a promise they make to work toward her future together, and her rapid literary recognition gives concrete form to the possibility he fought to protect.

Background and the choice to continue

Sanae’s writing competes with an exhausting routine. She gets up early to do chores, works in the afternoon, and prepares dinner when she returns; more housework and time with her father leave her less than an hour a day to write. On days off, exhaustion can leave her collapsed. She sometimes goes to the library to write, but her schedule makes sustained work difficult. Although an editor has taken an interest in her after she does not win a writing contest, she tells herself that novels are unnecessary and that her mother asked her to take care of the household.

Tooru, six years younger, recognizes how close his sister is to giving up. When their father is away, he overhears her arguing by phone with the editor. Sanae says that talent does not give her the right to burden her family. After the call, Tooru sees her looking down and holding her elbows, an image that makes her discouragement unmistakable to him. He asks her to keep writing, and when she says she is done, he refuses to treat that answer as final.

A shared effort at home

Tooru answers Sanae’s worry about burdening the family with an offer to take on housework. He reminds her that she scolds him when he does something wrong, and casts his plea for her to keep pursuing her dream as his turn to scold her. He tells her she does not have to stay in the house and that he can take care of their father. The offer is not casual: Tooru is still only six months out of elementary school, and he is frightened by the prospect of his sister leaving. He nevertheless chooses to support her, and cries as he asks her not to give up.

Sanae agrees that they will work at it together and promises not to quit writing. From then on, she teaches Tooru how to keep house and cook, including the importance she places on sanitation. He helps after club activities, and as his skills grow, he leaves club early to shop and prepare dinner. He also washes the bathtub and serves their father dinner and draws his bath. After a year of learning from Sanae and managing tasks himself, Tooru can run most of the household. The practical result is that Sanae’s burden eases, giving her time to rest and write.

Their arrangement makes the pursuit of her ambition a family undertaking rather than a private wish. There is only one computer, and it belongs to their father; Sanae writes her novels by hand while Tooru studies. The account connects her chance to write not to a sudden change in her circumstances but to repeated, ordinary labor shared between siblings.

Departure and what follows

In late winter, after Tooru learns that he has been accepted to the high school he wants to attend, he realizes Sanae is preparing to leave. She had begun preparing to quit her job at the start of his third year of junior high. Early one morning, while their father is still asleep in the room he shares with Tooru, Tooru slips out of bed and finds Sanae putting on her shoes in the entryway. His question about whether she is going confirms the departure he has anticipated.

Tooru sees her off by saying he will see her when she comes back. Sanae apologizes, explaining that she feels she has taken his time and opportunities; he answers that the difficulty her departure may cause is nothing beside what she has done for him since his first year of junior high. He addresses her as Keiko Nishikawa and tells her he is rooting for her. The exchange holds both sides of their history at once: Sanae regrets the cost to her brother, while Tooru treats the years of care she gave him as a reason to support her now, not as a debt she must repay by staying.

Sanae leaves the familiar apartment with a bag, and about six months later a novel by Keiko Nishikawa wins the Literary World New Author Prize. A year and a half after her departure, another book is nominated for the Akutagawa Prize. The speed of this recognition sharpens the contrast between the years when she had almost no time to write and the life made possible when she finally leaves to pursue it. Tooru rejects Sanae’s description of herself as having sacrificed her opportunities for him: he tells her she did not abandon him, that she finally did what she wanted, and that he is genuinely happy for her.

Significance in the family story

Sanae’s departure marks a change in the siblings’ relationship. For years she has cared for the household and for Tooru; before she leaves, he takes on enough of that work to make room for her own ambition. His support does not erase his fear of losing her, but his farewell turns that fear into encouragement. Their separation is thus framed not as proof that family ties have failed, but as an outcome the siblings help make possible together.

The episode also gives lasting weight to Tooru’s later reflections on Sanae. Her writing career is not presented as a simple reward for leaving: it follows a period of constrained time, paid work, housework, and doubt, and it becomes possible through the help she accepts from her brother. In the timeline of the wider family story, the departure precedes her recognition as a writer and their eventual reunion at a book signing. The promise to see each other again makes the leave-taking a separation with a future held open, rather than a definitive severance.