Following the accident that left her with retrograde amnesia, a young Yae Noguchi returns to her childhood home in Hokkaido to attempt to recover her memories. Despite help from her mother and best friend, Nonko, she remains unable to remember her life with Harumichi. During this time, Harumichi sends her a letter after returning to the Self-Defense Force, but Yae’s mother chooses to hide it, effectively severing their tie.

The revelation that Yae's mother intentionally kept them apart by hiding Harumichi’s letters adds a layer of tragic irony to their current dynamic, as Harumichi believes she moved on while she actually never knew he tried to reach her. Viewing Options (Italian Subtitles)

The episode title references the 2018 event of Mars approaching Earth, symbolizing the "near-miss" or re-alignment of these two individuals whose lives drifted apart for years.

A significant breakthrough occurs in the present when Yae encounters Harumichi's deaf sister, Yu. Despite her amnesia, Yae’s hands instinctively remember how to use Japanese Sign Language (JSL), a skill she originally learned in the past to communicate with Yu. This "muscle memory" underscores the depth of her past connection with Harumichi's family.