Unbeknownst to them, main character A loses their guardian angel in a freak accident. They go throughout their daily life, narrowly avoiding death at every corner, and settle into a deep depression. Luckily for A, main character B can see guardian angels. B sees A walking on the street, and approaches them, hoping to help.

Notes: Originally, I had planned for this to be a girlxgirl story, but you can make it whatever you want. This story has a good opportunity for drama and serious themes, or it could be slightly comedic. The side character of B's guardian angel could either act as comedic relief or a wise sage archetype, or something else.