Also known as: 寿命差, いつか訪れる結末
A work about a long-lived character outliving or aging more slowly than others. It can often be Sad, or even {{pool:1446|Heart Breaking}} or {{pool:439|Soul-Crushingly Depressing}}. Often occurs with elves, Vampires, Androids, and other long-lived or immortal characters.
It does not count if both characters age equally, or if the younger character dies of unnatural causes (such as Murder).