One spring, Satoko Tawada, a 30-year-old office worker for a sports manufacturer in Tokyo, meets a 12-year-old elementary school student named Mashu Hayami in a park near her home and teaches him soccer.

When Mashu's father finds out about their relationship, he is angry and asks Satoko's employer to punish her, and she is transferred to a branch office in Sendai.

Satoko is then asked by Shiikawa to join the project team he set up, and she decides to return to Tokyo.

The night of Satoko's return to Tokyo, Mashu confesses to her but is rejected on the basis that they are adult and child.

[5][6] Futabasha collected its chapters in four tankōbon volumes, released from June 11, 2016, to December 12, 2017.

[11] In North America, Vertical announced the English release of the manga in July 2017.