Completely hetero shoujo

A regular high school girl (a commoner) and the school's prince meet and have a faithfull encounter. The prince is kinda closed-off and awkward about the world and the way normal people should behave. It's cliche, but it's adorable ocne you start reading.

A girl gets thrown into a different period of time. While there, she is sacrificed and becomes the water god's bride, meanwhile the child she befriended while there vows for revenge against the water god as well as his own mother who sacrificed her.

One of them is supposedly a pure sadist, while the other one is a pure masochist, but to me, it seems like those lines are sometimes blurred a little.

"I love you"
"This sentence...turns me bad"

A guy with a scary face who's really just a sweetheart and wants to be a nursery school teacher. A girl with a little sister helps him with this dream.