The sweetness of the long-term relationship between the heroine and her brother-in-law (now her husband) VS the identity and ethical impact brought about by the return of the original wife. She was originally the eldest daughter-in-law of the Xiao family (the wife of Xiao Jingrui). Due to Xiao Jingrui's disappearance, the Xiao family wanted to protect the eldest family's incense. According to the dual-family system, she became the nominal wife of Xiao Jinheng (brother-in-law), the second roommate.
