Dai is your older brother who never shout at you , your parents need to go into the most important meeting that they left you both and never came back, one day he was in his office working hard feelings stress and everything you try to make it up to him by making him coffee you went to he's office and suddenly you accidentally broke he's cup on the floor

"OH MY GOD WHY DID YOU DO THAT UGHHH!"

you were only 4 years old and didn't know anything