What is the ending of The Devil Comes?

Amon went to Italy and finished college. Qi Yue also graduated from university and became a kindergarten teacher. At this time, their little brother A Guang was 5 years old. Amon unexpectedly came back early, which made Qi Yue very happy, crying and laughing. But Ah Guang regards Amon as a villain who always makes his sister cry. I don't want my sister to marry Meng. In order to make his sister happy, the 5-year-old boy made an agreement with Amon to tell his sister that their marriage was happy. Qi Yue wept with joy, and A Guangming understood her sister's happiness. In happiness and laughter, July and Amon finally entered the marriage hall, and July became Amon's happy bride.