After two and a half years of a long-distance relationship, the complicated erotic novelist Kijima and his younger boyfriend Kuzumi find their connection strained by the pressures of everyday life. Kijima has returned to his family home in the countryside where he lives with his mother and his sister Natsuki and her family. He is a moody and stubborn social recluse who often clashes with his strong-willed sister. Meanwhile, Kuzumi has started a demanding new job at an advertising agency in the city, leaving him exhausted and with no time to write letters to Kijima. Kuzumi is sweet-natured and eager to please, but his career consumes him. Kijima, who is famously bad with technology and often has a phone with zero percent battery, feels the distance growing between them. They maintain their relationship through occasional, passionate meetings at love hotels, but the lack of regular communication begins to create misunderstandings.

Their fragile peace shatters when Kijima discovers that Kuzumi visited a nightclub for work. Feeling insecure and jealous, Kijima insinuates that Kuzumi, being young and sexually active, has the freedom to be with others. The argument becomes physical, and they stop speaking. Shortly after, Kijima has an explosive fight with his sister and runs away from home. While staying at a love hotel, he intervenes in a violent scuffle to protect a woman named Haruko, who runs a rowdy karaoke bar. In the process, Kijima injures his left arm, an echo of the accident that first brought him and Kuzumi together. Feeling guilty, Haruko offers Kijima a place to stay at her house while he recovers, where she lives with her handsome and intriguing son, Shizuo.

Unable to write due to his injury, Kijima finds himself in a familiar position. Just as he once dictated his sensual stories to Kuzumi, he now asks Shizuo to act as his scribe and write his novels for him. A strange and tense relationship develops between Kijima and Shizuo as they work together. Weeks later, Kuzumi finally tracks Kijima down at the karaoke bar, only to walk in on a compromising situation between Kijima and Shizuo. Feeling betrayed and heartbroken, Kuzumi confronts them, leading to a dramatic showdown. The mother-son duo realize that Kijima and Kuzumi need to resolve their own issues, leaving the couple alone to face their problems.

The final arc of the story focuses on Kijima and Kuzumi finally opening up to each other. They confront their insecurities, their lack of honesty, and the fears that have been driving them apart. Kijima struggles with his inferiority complex, feeling that his younger, more successful boyfriend will eventually outgrow him. Kuzumi, who is an only child, genuinely loves the warmth of Kijima's family and is determined to make the relationship work. After much turmoil, they reconcile. Kijima receives acceptance from his family, who welcome Kuzumi. The story ends on a hopeful and happy note, with the couple overcoming their rough patch and committing to a future together, more honest and open than before.