I have happy and carefree memories of my middle school days...

In contrast to this past, Kanzaki Miwa (Matsumoto Wakana) now lives in an unbearable reality.She looks glamorous on the surface, but in fact she lives an indifferent married life with her husband Kanzaki Hiroki (Tanaka Kei), who always makes bad words. I don’t know when she started to feel disgusted with herself who always wore a fake smile.

One day, Miu invited her best friend Makoto Komori (Yuri Hisamatsu) and her son Kota (Juki Iwamoto) to her home.Looking at the two of them, she thought to herself that if she could have a child, she might be able to change the situation.The next morning, she cautiously expressed her thoughts to Hiroki, but he dismissed her with the words "just let nature take its course" and even exposed the discord between the couple to the public.

It was another day like this. Miyu looked up at the towering water supply tower, recalling the days when she was a middle school student and laughed with her childhood sweetheart under the water supply tower.With this memory in mind, she walked into the library where she often went, as if she was being guided.Suddenly, someone called her, and when she looked back, standing there was her childhood sweetheart Fuyugetsei (Tatsuya Fukasawa).The two were surprised to see each other again when they were middle school students after a long separation, but they also chatted naturally as if they were traveling back in time.

She thought that this reunion after a long absence would make the two people's hearts more closely connected, but Miyu informed the other party that she was married. Although Dongyue could not hide her lingering feelings after hearing this, she also announced that she was about to go to Africa to work.

“This is God’s parting gift to me——”

After hearing Dongyue's words, both of them felt a sense of emotion that it would be difficult to see each other again...