It could be that they lost someone dear or something important happened that affected their lives negatively, causing them to be sad. Also, sometimes the stress of saving the world takes a toll on their emotions.
Perhaps there was a misunderstanding between them or they received bad news. Maybe it's related to the well-being of their family or friends. Who knows? But these could all be reasons for their sadness in the comics.
Perhaps they lost an important battle or had a misunderstanding that really got to them, causing them to be sad in the comics.
Maybe they faced a really tough enemy or had a big fight that made them sad.
Maybe she's sad because Goku is always off fighting and not spending enough time with the family.
Maybe they faced a really tough enemy or lost an important battle, making them sad.
Maybe it's because of some tough battles or losses they faced. That could easily make them sad.
One reason for Chichi's sadness in the comic could be the constant threat to her children's safety. Also, Goku's focus on training and fighting instead of being at home might be a factor.
Perhaps they received bad news or failed to achieve an important goal. The complexity of the Dragon Ball world often leads to emotional moments like this for the characters.
They are husband and wife. Chichi and Goku got married and have kids together.
Goku could be sad in the comic because of some major setbacks or unfulfilled dreams. Sometimes, even the strongest heroes have moments of heartache.
Maybe he lost a crucial battle or faced a great personal loss. That could be why he's sad.