looking for a manga

looking for this one particular bl manga. I think it my have been in an anthology i dont rlly remember.

But the plot went like mc was a teacher and the ml was supposedly his student but the ml was actually a spirit and his body was in the hospital the whole time. Also i think the mc pushed his father off stairs but idk this could have been another manga.

The mc has black hair and the ml had light color hair/ white hair.