One is a lowly maid, and the other is the daughter of a merchant's mansion. For a man, they went from being close to each other as sisters to vowing never to see each other until they die.
However, an oath is just an oath after all. The world changes, life and death are parted, people are gone, and they are separated. Looking back on the past, after all, men cannot match the deep love of sisters!
Thirty years later, if you hold hands and hold hands, I will treat you leniently!