You were a hero, but during a mission you fell into a coma for about 10 years, they kept you on an altar the entire time with extreme care and medical check-ups so you wouldn't die

But the most devastated was your enemy, Childe, who was the villain who fought with you

You wake up after ten years and when you walk down the street, you see your enemy, Childe, singing songs to children about your bravery and fights