I remember reading this manga where two girls where obviously in love but because of the time they were in they couldn’t be together. I think one of the girls had curly or fluffy hair or something and I remember them being in a classroom at the beginning. I think the curly haired girl wanted them to be together but the other girl was scared. Then thee was a time skip and the main girl was in her bed and still couldn’t accept herself while she looked at a picture of curly hair girl with a different woman.
Sorry for the horrible explanation but I just remembered this and want to read it again. Like I said it was definitely a one shot.