~•°•behold, a dragon•°•~

Died because he got run over by a cloying couple, mc reincarnates as a powerful white dragon somewhere. Years later, he gets attacted to a group of slimes and looks after them, keeping them protected within his territory. Suddenly, a female knight came wanting to be a dragon slayer. But shes terribly weak. They become friends...
Eventually he learns a skill to turn into a human and travels with a few slimes as an advdnturer