I think this manga might be a oneshot. Female student writes on a desk and someone responds to her. It turns out to be a boy sitting in the same classroom but from the past. They agree to meet in the future on her graduation day under a tree at school. The boy turns out to be her teacher who had changed his name due to his parents' divorce. Does anyone know the title to this manga 😕 Thanks

It's Angel time. 🙂

Thanks!!!!! 🙂