I have a lot of green plums

After traveling across time and becoming an elementary school student in Japan, there were several more figures around Si Yue Yu Zhi.
The single mother next door raised five children on her own and her life was hard.
The hearing-impaired girl in the class is always bullied and humiliated.
A young lady was isolated by her classmates for some reasons.
……
He just gave them a little help from the perspective of an adult without asking for anything in return.
I thought they would each start a new life, but many years later, they still stayed by his side.
"Aren't we childhood sweethearts? It's only natural for me to be with you."