Ai Zai Meng Xing Shi Fen (2023)

Both are mini dramas in which a car accident causes the FL's soul to enter a stranger's body, leading to her taking over that girl's life and becoming involved with the ML.

Both involve a being who can enter dreams and falls in love with a human. Both are short length dramas.

Both are mini dramas in which non-humans or gods control humans in some way by writing their lives or directing their dreams. One of these beings ends up falling in love with a mortal.