I have a bunch of short story ideas that made me tear up... and I'm known to be de sensitized and have had my fair share of trauma in this life. Takes a lot to make me cry.
They don't have any depictions of s3x or violence I can assure you. Far tamer than any of my current and previous works. In my opinion at least... but more tear jerking than anything I've put out... you might have to have some tissue ready.
My saddest scene according to reader feedback:

Does such a work need to be tagged M?