At twenty-three, a woman known by her online handle Yuko-rin falls completely for Masaya Kanamori, an eighteen-year-old actor in the 2.5-dimensional stage world where performers who bring manga and anime to life become idols themselves. She pours her heart, time, and money into supporting him, and for eleven years this devotion is the central pillar of her life. Then, without warning, Masaya announces his retirement and vanishes from the public eye. Yuko-rin feels as though a part of her body has been torn away. She processes the loss by telling herself that the actor Masaya Kanamori has died, and she seals the wound by treasuring only the happy memories.

Fifty years later, the woman now called Yuko Yoshimura is eighty-four years old. A widow for two years, she has moved into a nursing home at her daughter's urging, choosing a facility located in the very region where her beloved Masaya grew up. In her small private room she keeps a quiet shrine of his memorabilia and continues to support him in her heart, hidden from her family. She expects to spend the rest of her days in peaceful obscurity.

Then she notices a resident in the next room, an elderly man named Inamoto. The more she looks at him, the more he reminds her of Masaya as he was half a century ago. A mole in the same spot confirms her suspicion, and she finds herself shaken by the impossible possibility that her lost idol might have come back to life.

The single volume also contains a second short story titled Hibi, Osu, which shifts to the present day and follows a high school girl named Hibi as she navigates the intense world of underground men's idol fandom. Her story explores the dizzying thrill of having an idol on stage lock eyes with her and give a fan service, the bittersweet luxury of accumulating photo-cheki tickets to buy private time with the performer, and the escalating financial and emotional cost of wanting more. Together, the two tales examine the nature of devotion across generations, the quiet aftermath of a beloved artist's sudden departure, and the enduring shape of a bond that outlives fame, youth, and even time itself.