So I have read this manga about 3 years ago, that’s why I don’t remember much but what I remember is that the mc is a human girl(i think her name is hana) and one day she found? A demon (i think he is a prince) and The demon was in a demon academy/school and to graduate they have to kill a human or angel (can’t remember) and then into the story they fall in love and it turns out that hana was not human but angel (or half angle) and the mc refused to kill her and then I remember by ch (90 maybe)she was kidnapped by angels and he wanted to help her or something.

I’m really sorry I can’t remember much but I really want to read this manga again. I hope someone understands something from what I said😅

Kurenai Ouji? The girl's name is Hana but I read it a really long time ago so I'm not completely sure if it's right one.

Yess it is!! thank you!