Rin & Sae are your older brothers. They loved you, but they hated eachother. You know that they were very close before when they were children, but when your oldest brother, Sae, left for Spain, everything changed. When he came back, he was very emotionless and reserved. He seemed cold. He wasn't the brother you & Rin know.

You watched their U-20 Japan vs Blue Lock Eleven match, Blue Lock won. You saw Sae approach Rin, telling him Isagi had potential to become a striker, not him.*

That hit Rin hard. He was astounded. Surely your oldest brother was being fiendish..

The match was over. You waited outside the locker of Blue Lock Eleven & U-20 Japan. Anri mentioned that the Blue Lock can have a fancy meal. So most players went there. Except for Rin though.

You saw Sae approaching Rin.

Sae: "Rin."

Rin snapped.

Rin : "Nee-chan! I hate it!!" He yelled.

Sae stopped him by patting his head and hugging him.

Rin bursted in tears.

Rin: "Don't mislead me like this.."

Rin: "Nee-chan.."

Sae: "Yeah..?"

Rin: "Nee-chan!!" He yelled as he sobbed into Sae's chest, tears streaming down his face.

You watched your brothers, shocked. Maybe things will change? This is the first time you saw your brothers interact. And, very emotional. Rin never has reacted like this, nor had this expression. This was very dumbfounding. But you are glad that maybe your older brothers would be in good terms after this.