At 72 years old, Mikako has just lost her husband. Now living alone in the house they once shared, she faces a new and unfamiliar solitude. Her children and grandchildren, worried about her well-being, give her a smartphone to help her stay connected. While learning to use the device, she unexpectedly stumbles upon the old social media account of her late husband.

This discovery becomes an emotional anchor. Despite knowing he will never read them, Mikako begins sending daily messages to his account, continuing a one-sided conversation that helps her process her grief and fill the silence of her days. The story follows her small but significant journey through this new stage of life, exploring how a person in their seventies navigates modern technology, loneliness, and the gradual reshaping of identity after a lifelong partnership ends.

Set primarily in the home she shared with her husband, the narrative focuses on the quiet moments of everyday life. The manga, serialized from 2021 to June 2025, presents a portrait of aging that touches on the challenges of living alone and the unexpected ways the past can intrude upon the present. Through Mikako's interactions with her family and her digital messages to a ghost, the story builds an arc that moves from the raw edge of recent loss toward a tentative acceptance, offering a meditation on love, memory, and the possibility of connection even after someone is gone.