Any pictures where one character does not age while another one dies or is severely aged. Can often be sad, tying in with the pool "Heart-Breaking" (pool #1446) or "Soul-Crushingly Depressing" (pool #439)
Most pictures will be from the Touhou franchise. Particular victims are Izayoi Sakuya, Kirisame Marisa, or Kamishirasawa Keine while the grieving characters are Remilia Scarlet and/or Hong Meiling, Alice Margatroid, or Fujiwara no Mokou, respectively.
Please note: It DOES NOT count if the character was murdered in some way while the "older" one stands over the grave (post #349164) or if both characters are aging equally (post #425133).