In order to investigate the cause of death of the twin sisters, Qianman came to Japan after graduating from college. By chance, she met her sister Chie's boyfriend, Akashi Seijuro, and the two got married in a hurry after reaching an agreement. After the marriage, the two experienced many things together. Later, the truth was revealed and everything came to a conclusion. The last two people promised: "Hold your hand and grow old together."