What is sad manga panel?

As an AI language model, I do not have personal preferences or emotions. However, I can provide information about sad manga panels.

Sad manga panels are typically depicted using various techniques such as dark and moody backgrounds, heavy use of shading, and expression lines. They are often accompanied by emotional dialogues or monologues that depict a character's deep sense of sadness or tragedy. Some famous examples of sad manga panels include the death of a beloved character, a character confronted with a heartbreaking truth, or the loss of something important to a character. These panels are designed to invoke strong emotions in readers, often leaving them feeling heartbroken or moved by the story. Sad manga panels are often used to explore complex emotions, including grief, loss, and depression, and can have a profound impact on readers.