Aohara Yu (Nagano Meiku) and Asano Taiyo (Yamada Yuki) started dating.Yukino's grandmother Yukino (Kimiko Yu) is hospitalized due to cancer. Taiyang is worried about Yukino and starts living with her at Yukino's house.However, the rain seems to have not adapted yet.The sun said to the rain: From now on, I want to call you "Yu".“Yu didn't like her name, she replied that she hoped she could think about it a little bit.

When Yu was cleaning Yukino's room, she found an old tape recorder.Yukino and Yu once recorded each other's messages with a tape recorder and kept a diary of exchanging voices.For Yu, who was still an elementary school student at the time, Yukino's gentle and warm voice was the most important treasure.

At this time, news came from the hospital where Yukino was staying that his condition had worsened.Yu rushed to the doctor immediately, and Yukino asked Yu to take her home.The hospital told Yu that if anything happened, she would be responsible for the consequences.Yu was very troubled, but Taiyang encouraged her and said it was okay and I was there too, so they took Yukino home.

”I don’t know if I can hold on for a few more days.% Xueno thought like this and made a request to Yu.That is, the first and last family trip with Yu's mother Xia Mei (Zhen Feisheng).