Town of Ashes

Your home and family are destroyed when you're still an infant. When all hope seems lost, a boy named Gohan finds and rescues you. As time goes by, two evil beings appear for the purpose of destruction. After the Z-Fighters fall to their deaths, Gohan (the last remaining Z-Fighter) takes you and a boy named Trunks under his wing and trains you both with hopes of stopping the heartless Androids 17 and 18.

With the fate of the world resting on your shoulders, you eventually learn how important a bond is.

Mirai Trunks x Reader