All the goodness begins in the summer when they first met ...

After she was abandoned by her birth mother since she was a child, she was adopted by a wealthy family. Both her adoptive parents and her younger brother were very caring for her, especially her younger brother had a lot of curiosity about the pretty new sister. But not long after, she was retrieved by her biological father, and she had to leave this warm family.

Years later, she met her brother again, only to realize that for many years, He had always been in love with her, but she had never noticed.

When she stopped thinking of herself as his sister, she realized that his soul fits hers so well.

Although their relationship has just begun, love seems to have been brewing for many years, and all the goodness begins in the summer when they first met ...