Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: Kannazuki no Miko
Kannazuki no Miko's final episode is a rollercoaster of emotion that has caused many to cry tears of sorrow then joy then continuously switch between those two states over the course of thirty minutes.
At least the final cry is one of happiness!
Any time Himeko cries about Chikane after the rape scene.