Triditional Historical Romance

Timeline: Traditional Japan.
Couple: Older male and younger female.
Setting: A child falls into a pond and then gets teleported to another place. She gets saved by a small boy, who brings her to his village. She thought they were kind, but the villagers betrayed her by sacrificing her to the water god, who is cold and unkind.

Timeline: Traditional China.
Comment: Older guy and younger girl. Guy becomes a kid in the morning and a grownup at night.
Setting: A girl gets sacrificed to the water god to bring rain for the villagers.

Timeline: A mixed culture of Arabia and Japan.
Couple: Older male and younger female.
Setting: A young lady goes against the prince of another country to save a small child. She gets called to the palace, expecting to get executed but when she sees the prince. He asks her to join his haram?!

Timeline: Ancient Egypt.
Couple: I am not actually sure. Her husband is a piece-of-shit while the guy who likes her can't stay close to her.
Setting: FL is the empress as well as the official wife of her half brother/husband. She goes against him and tries to prove to others, that a women also can be king.

Timeline: Traditional Japan.
Couple: Older male and younger female.
Setting: A young girl needed money and took a job which seemed like it will get her lots of cash. Unfortunately it turns out that her job is to be a fake wife of the ruthless and coldblooded emperor. The girl became afraid, only to suddenly find out that the Emperor who acts like a ruthless killer is actually a soft and kind bunny?!