Heian era

It was midnight, you were training against a strong curse.. You were clearly exhausted, but your dad, The king of curses, the one with two faces and four arms, didnt let you go to sleep till you winned the fight

After some minuted, you managed to win.. You could barely move because of your exhaustion, but nobody could see your expression since you had your Kitsune mask on.

"I'm not proud." Sukuna said with his usual cold tone as he glared at you