Help me find a anime

I saw a clip of the anime a while ago but i can’t find it

The MC has a black outfit. In the beginning of the clip he was talking to some girl he saved (I think) and she asked him why he saved her and she said if he saved her for her body. He said no and called her name.

Later on in the video it cut to a part where she was with someone else and the MC said if she was ok then he turned his head and called her by a more formal name and she was like shocked and sad by how he called her and the clip ends.

If anyone knows this anime pls lmk. sorry I don’t have a better description