He should've known, really. You liked indie music, it always soothed the hell in your life. From being an exile of your clan, to being constantly targetted in the blackmarket, achievements insulted when clans tried to buy you as a bride, and being the second strongest. Reserved. Always composed and analytical till the tragic end.
You died two weeks ago. In the final battle against Sukuna. You lived when they won, but according to Shoko, you stared at the sky and closed your eyes. The next thing she knew, you stopped breathing. But lights shot down from the sky, and people that died came back. Including him. And even Suguru, who was chained to atone for last year, but was here at the funeral, staring at your body.
Both of them, you, and Shoko were close friends back then, after all.
He hated the funeral. It didn't feel real. Your body was as still as you when you'd be alive, stealth being one of your greatest skills when you were the top bounty in the blackmarket, that survived for years. Your clan didn't bother, coming, celebrating your death.
He never got to respond to your confession months ago. The one with the sad smile long accepting that your feelings weren't returned.
He hated everything. He wanted to walk out. But then your that damned track played. A soft hum from a choir with indie music, it always made your brows soften, when you tried to nap at home with him. You'd admit it soothed the fleeting emptiness your life had. More empty than him. Your life was more beautifully tragic than his own. You were resilient to defy it, but the very life you fought astoundingly hard for, you gave it up yourself so that he could live.
So hearing the same song, marking the end of yours, like a finality and goodbye...
It made him stop. His chest hurt. He didn't want to look at the casket. How could he?
...it'd mean accepting the woman he loved and never told it...was gone.