Record of Grancrest War (2018)

A woman agrees to give herself to a man for one night at his request. It's about the same as a show of good faith if he is to become her sword.. She is completely bare with only her breasts partially covered by her hair. No nudity is shown, but the man's torso can be seen thrusting from her point of view and the woman can be seen crying.

There are a few scenes with women that are completely naked, but nothing is shown as hair or some other object is always placed quite conveniently.