Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: Lucky Star
In the OVA when Kagami wakes up. Tsukasa's face. Just. Tsukasa's. Face.
The Yonder Here. It is more than sad. Soijiro never reveals how Kanata died [if I remember correctly]. Soijiro is suspiciously very emotional [and this is dealing with a dead person]. SOIJIRO KILLED HER.